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L'Air du temps Food Identity independently reviewed
Food Identity How restaurants source, cook and care. Independently reviewed

L'Air du temps

Vegetables from a five hectare garden in the Namur countryside set the menu here, cooked with Korean fermentation and sharp acidity by Sang Hoon Degeimbre.

Allergies Not published, ask the kitchen ahead

Food Identity How restaurants source, cook and care. Independently reviewed

L'Air du temps

Vegetables from a five hectare garden in the Namur countryside set the menu here, cooked with Korean fermentation and sharp acidity by Sang Hoon Degeimbre.

The essentials, at a glance

Allergies Not published, ask the kitchen ahead

Documented practices
Independently
reviewed
Local sourcing
Seasonal cooking
Low waste
Responsible meat & fish
Social impact
Plant-forward menu
Health-intentional kitchen

Documented practices

Local sourcing Own five hectare garden grows 95% of vegetables
Seasonal cooking Garden calendar sets the seasonal menu
Low waste Whole plants used, on-site miso and fermentation
Responsible meat & fish Trout from Ondenval, Berkshire pork from Guy Vanhoof
Social impact Services cut to five weekly for staff time
Plant-forward menu Vegetables at the centre, meat and fish as accent
Health-intentional kitchen Specific health practices named in at least one sub-area

Style
Fine dining
Cuisine
Asian
Fusion
Good to know
Terrace
Garden
Recognised by
We're Smart Green Guide 360 Eat Guide
Recognised by
We're Smart Green Guide·Top 100 360 Eat Guide

The delicious details

L'Air du temps occupies a square farmstead in the Namur countryside, where Sang Hoon Degeimbre moved the restaurant in 2013. A five hectare garden runs beside it, tended by head gardener Benoît Blairvacq, and it supplies almost all of the vegetables that reach the table.

What the garden is ready to give decides the menu, so the cooking turns with the season. A fermentation cellar carries the summer and autumn harvest into the winter dishes, and miso and soy sauce are made on site rather than bought in.

Meat and fish come in small measure and arrive with names attached: trout from Ondenval, Berkshire pork from Guy Vanhoof, green asparagus from the Noël family beside them. Guests pick one five course menu for the whole table, with wine or a non alcoholic pairing.

Menu
What's on the table, and what's left off

Five-course tasting menus where one menu is chosen for the whole table. Vegetables carry the structure; meat and fish appear sparingly as an accent. The kitchen builds its own pantry, miso, soy sauce and fermented vegetables are all made on site, and the garden supplies almost all the produce.

Menus are tasting menus of five courses, each dish arriving as two or three preparations, and one menu is chosen for the whole table. Vegetables carry the structure; meat and fish are used sparingly, as an accent in a limited number of dishes.

The kitchen works from whole ingredients and builds its own pantry: miso, soy sauce and the vegetables that fill the fermentation cellar are all made on site instead of bought in, and no Asian shop products are used. Lacto fermentation is applied for its nutritional value as well as its flavour, developing the amino acids that give the cooking its depth, and the garden's own produce keeps dishes close to their whole state. A vegetarian menu is available.

Cuisine

Asian
Fusion

Dietary options

Vegetarian options

Health-intentional kitchen✓

Specific health practices named in at least one sub-area
Vouched

Almost all vegetables are grown on site, miso and soy sauce are made in house, and no Asian shop products are used. Lacto fermentation is deliberately used for healthy eating as well as for taste and waste reduction, developing the amino acids that give the cooking its depth.

Impact score
How this restaurant rates
4 - Recognised

Sourcing sits close to home and carries names. Almost all vegetables come from the restaurant's own five hectare garden, where around 400 species are grown, and the producers behind the rest are credited: Berkshire pork from Guy Vanhoof, trout from Ondenval, green asparagus from the Noël family, an aged cow each year from Lothar Viltz in Murringen. The season decides the menu rather than the other way round, and the garden's calendar is what moves it.

Waste reduction runs through the cooking. Whole plants are used end to end, the fermentation cellar preserves the summer and autumn harvest for the winter months, miso and soy sauce are made on site, and the kitchen seeks out cooking methods that use the least energy and water. Meat and fish appear in small quantities and are traced back to named farms. On the people side, the number of weekly services has been cut back so staff have real time away from work.

Vegetables are the centre of the kitchen's identity, which the We're Smart Green Guide recognises with a place at number 17 in its Top 100 for 2025 and its Pure Plant Choices designation. The restaurant also holds a Michelin Green Star, awarded in 2021 for its short supply chains, and is listed in the 360 Eat Guide.

The impact dimensions

Local & direct sourcing✓

Seasonal cooking✓

Low waste & circular practices✓

Sustainable animal products✓

Social impact✓

Plant-forward menu✓

Vegetables from the restaurant's own five hectare garden supply about 95 per cent of what the kitchen uses, with named Walloon farms providing the rest: trout from Ondenval, Berkshire pork from Guy Vanhoof, and green asparagus from the Noël family.

A five hectare garden beside the restaurant, run by head gardener Benoît Blairvacq, grows roughly 400 species of vegetables and herbs. The chef states the restaurant is self sufficient in vegetables and that around 95 per cent of those used come from these gardens.

Animal products and bought in produce are traced to named Walloon producers. The May 2026 tasting menu credits trout from Ondenval, Berkshire pork from Guy Vanhoof and green asparagus from the Noël family. Earlier coverage names an aged cow each year from Lothar Viltz in Murringen, Berkshire pigs from the Ferme de Tabreux in Hamoir, pigeon from Jean-Yves Bruyère in Eghezée, and matured beef from the butcher Philippe Rondou in Leuven.

Strongest sourceclubdesgastronomes.be ↗

The garden calendar sets the menu, and fermentation in a dedicated cellar carries the summer and autumn harvest through the winter months.

The restaurant's menu is built on what the garden is ready to give, so the cooking turns with the season. A May 2026 independent review describes the opening dish as a compass that travels the year following the rhythm of the seasons, and records a spring menu built on the first radishes and white and green asparagus, with the plate described as evolving continually.

Lacto fermentation in a dedicated cellar carries the summer and autumn harvest into the winter menus rather than reaching for out of season imports. The chef states that only seasonal produce is used across the garden's roughly 400 species.

Strongest sourceclubdesgastronomes.be ↗

Whole plants are used end to end, miso and soy sauce are made on site instead of bought in, and lacto fermentation in a dedicated cellar preserves the harvest for winter menus.

On the food waste side, whole plants are used end to end, the fermentation cellar preserves the garden's summer and autumn harvest for the winter months, miso and soy sauce are made on site, and Mangalitza pigs were introduced both to prepare the soil without mechanical tilling and to be used in full.

On energy and water, the kitchen seeks cooking methods that use the least energy and water, including steaming proteins over gently heated vegetable leaves. The chef describes plans for 500 square metres of solar panels to cover 85 per cent of the site's energy and a field water recycling system. Michelin awarded a Green Star in 2021 for the restaurant's sustainable approach and short supply chains.

Strongest sourcertbf.be ↗

Trout from Ondenval and Berkshire pork from Guy Vanhoof appear sparingly on the menus, named on the plate.

Animal products are deliberately a small part of the offer, with fish and meat appearing as an accent in a limited number of dishes. The May 2026 tasting menu credits trout from Ondenval and Berkshire pork from Guy Vanhoof. Earlier coverage names an aged cow each year from Lothar Viltz in Murringen, Berkshire pigs from the Ferme de Tabreux in Hamoir, and pigeon raised on crop milk then cereals by Jean-Yves Bruyère in Eghezée.

A vegetarian menu is available on the standing offer.

Strongest sourceclubdesgastronomes.be ↗

The chef employs 80 people across four restaurants and has cut the weekly services from ten to five to protect staff time away from work.

The chef employs 80 people across his four restaurants and has deliberately cut back the number of weekly services from ten to five, closing deliberately so that staff have real time away from work. He describes reading his teams closely after years of 90 hour weeks himself, and the Michelin listing carries his statement that people and relationships come before technique.

The restaurant runs cooking courses and garden immersion for guests, and the chef takes a public position on the trade's role in society and politics.

Strongest sourcertbf.be ↗

Vegetables are the centre of the kitchen's identity, with meat and fish appearing sparingly as an accent in a limited number of dishes.

The garden supplies the restaurant's vegetables almost in full across roughly 400 species. A 2019 independent review describes the cooking as around 80 per cent vegetable based produced in near total autonomy, and Michelin and Gault&Millau both describe vegetable led cooking with the garden as its source.

The We're Smart Green Guide lists the restaurant at number 17 in its Top 100 for 2025 and awards its Pure Plant Choices designation, offering it as an example of the We're Smart restaurant of the future. A vegetarian menu is available.

Strongest sourceWe're Smart Green Guide ↗

Sourcing signals

✓
Own-grown produce
✓
Direct named-farm sourcing
✓
In-house preparation

A five hectare garden beside the restaurant is run by head gardener Benoît Blairvacq with roughly 400 species of vegetables and herbs.

Producers are named on the plate: trout from Ondenval, Berkshire pork from Guy Vanhoof, and green asparagus from the Noël family.

Miso and soy sauce are made on site instead of bought in, and lacto fermentation in a dedicated cellar preserves the harvest for winter menus.

Visit & practical info
Address, price, and more
Address
Rue de la Croix Monet 2, 5310 Liernu, Liernu, Belgium
Open in Google Maps ↗
Price
€€€€
Format
Fixed five-course tasting menu for the whole table. Dinner Tuesday to Saturday, lunch Thursday and Friday. Booking required.
Hours
MondayClosed
Tuesday19:00–20:30
Wednesday19:00–20:30
Thursday12:00–13:30, 19:00–20:30
Friday12:00–13:30, 19:00–20:30
Saturday19:00–20:30
SundayClosed
Style
Fine dining
Good to know
Terrace
Garden
Web
airdutemps.be
Reviewed by My Treats
Last reviewed 7 Oct 2026
Reserve To website
Link copied
How we score
The My Treats impact scale

Every restaurant is assessed against SEERO, our six-dimension sustainability framework — covering sourcing, seasonality, waste, animal products, social impact, and plant-forward cooking. Each finding is weighted by how strongly it is corroborated. The combined result is translated into an impact score from 1 to 5.

The five levels

SEERO is an acronym for Starting, Engaged, Endorsed, Recognised, Outstanding:

Starting First verified signals of sustainable practice.
Engaged Credible practice across two dimensions.
Endorsed Meaningful practice across three or more dimensions.
Recognised Strong practice across four or more dimensions, with independent corroboration.
This place
Outstanding Top-tier practice, confirmed by recognised third-party audit.

How a level is reached. Each level needs two things together: a minimum number of dimensions covered, and a minimum overall strength of evidence across them. A dimension only counts once its evidence is specific and substantiated — a passing mention doesn't qualify. Meeting only one of the two keeps a restaurant a level lower.

Scores of four or five require human validation and, at the top tier, an external audit. Scores are based on publicly available evidence and restaurant submissions at the time of assessment.

Full methodology→
Impact dimension
—
How this dimension works
—
How evidence is weighted
Self-declared Stated by the restaurant on its website, menu or in a submission. Plausible, but not yet independently corroborated.
Researched Found through independent research; one credible third-party source backs the claim.
Vouched Corroborated across more than one independent source. Some gaps may remain.
Audited Fully corroborated across independent sources or by a recognised third-party certification.
What the sourcing checkmarks mean
✓ Full check — independently verified: corroborated across more than one source, or audited / third-party certified (vouched or audited).
✓ Light check — self-declared or from a single source. Not yet independently verified.
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