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

Rizom

A relaxed gastronomic restaurant inside the Grand-Hornu museum site near Mons, where chef Olivier De Vriendt builds a monthly menu around vegetables and regional produce, with every course available in a vegetable, fish or meat version.

Allergies Not published, ask the kitchen ahead

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

Rizom

A relaxed gastronomic restaurant inside the Grand-Hornu museum site near Mons, where chef Olivier De Vriendt builds a monthly menu around vegetables and regional produce, with every course available in a vegetable, fish or meat version.

The essentials, at a glance

Allergies Not published, ask the kitchen ahead

Documented practices
Independently
reviewed
Seasonal cooking
Low waste
Plant-forward menu

Documented practices

Seasonal cooking Menu rewritten monthly around seasonal produce
Low waste Fermentation, preserving, secondary cuts and in-house bread
Plant-forward menu Every course in vegetable, fish and meat versions

Style
Fine dining
Casual
Cosy
Cuisine
Asian
French
Fusion
Good to know
Terrace
Private dining room
Wheelchair accessible
Children's menu
Recognised by
We're Smart Green Guide
Recognised by
We're Smart Green Guide

The delicious details

Rizom occupies a wing of the Grand-Hornu, the nineteenth century mining complex near Mons that now holds a contemporary art museum and a design centre. Brick, wood, concrete and metal set the tone of the room, and the plates are served a few steps from the galleries. Chef owner Olivier De Vriendt spent five years with Sang Hoon Degeimbre before taking the kitchen on, and he describes his cooking as responsible gastronomy rooted in terroir.

Vegetables come first here and legumes carry the menu, with animal protein arriving as a complement rather than the centrepiece. The menu is rewritten every month around what the season gives, and each course can be taken in a vegetable, fish or meat version.

Bread, fermentations and shoots are made and grown on the premises, and the drinks list sets Belgian microbrews and regional wines beside three kefirs from the kitchen.

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

Every menu runs in three versions: vegetable, fish or meat at each course. Vegetables lead and legumes form the base, with animal protein offered as a complement. The kitchen bakes its own bread, runs a standing fermentation programme, grows shoots on site and makes three house kefirs for non-alcoholic pairings.

Every menu runs in three versions, so each course can be taken as vegetable, fish or meat, and a vegetarian route through the full tasting sequence is always available.

Vegetables set the structure of the cooking: broccoli worked in several textures, beetroot with sambal spice, salsify, braised cabbage, courgette with tagetes. Animal protein joins as a complement, and the cheese course leans on Belgian makers.

The kitchen bakes its own bread, runs a standing fermentation programme, grows its own shoots on site and preserves fruit and vegetables so that a flavour from one season can return in another. Four pairings accompany the menus, among them a non alcoholic flight built on three house kefirs. Children's dishes are available on request.

Cuisine

Asian
French
Fusion

Dietary options

Vegetarian options
Impact score
How this restaurant rates
3 - Endorsed

Three areas of responsible cooking are confirmed at Rizom, which gives it a rating of three planets.

The menu is rebuilt every month around what is in season, and fermenting and preserving let the kitchen carry produce from one season into the next rather than reaching outside it. That preserving work, alongside bread, shoots and kefirs made on the premises and the use of cuts such as pork trotter and cured lard, sits behind a kitchen that describes its technique as zero waste. Vegetables and legumes form the base of the menu, animal protein is offered as a complement, and every dish can be taken in a vegetable version.

Rizom is listed in the We're Smart Green Guide, the international guide to vegetable led cooking.

The impact dimensions

Local & direct sourcing✓

Seasonal cooking✓

Low waste & circular practices✓

Sustainable animal products✓

Social impact✓

Plant-forward menu✓

Local sourcing is stated and quantified at around 85 per cent, with the kitchen working with about a dozen regional producers and drawing nearly everything except coffee, chocolate and some citrus from a very short radius.

Local sourcing is a stated and quantified priority. In an interview the chef puts the share of locally produced ingredients at around 85 per cent, editorial coverage reports that the kitchen works with about a dozen regional producers, and a 2026 feature records that nearly everything except coffee, chocolate and some citrus comes from a very short radius.

The host museum's restaurant page describes the cooking as terroir cuisine inspired by local producers, and the We're Smart Green Guide listing cites a focus on the region.

Strongest sourceParis Match ↗

The full menu is rewritten monthly around what is in season, and fermentation and preserving allow the kitchen to carry produce across seasons.

The full menu is rewritten monthly, which is more frequent than the quarterly minimum, and seasonality is communicated as a guiding principle rather than as decoration. The host museum's restaurant page and the Grand-Hornu press material both describe a monthly menu built on seasonal produce; a 2026 editorial feature confirms the monthly rotation and the seasonal basis independently.

Gault&Millau Belgium describes the kitchen as combining modernity and terroir, and press coverage of the chef's provincial award describes the restaurant as highlighting local terroir products and seasonality. Fermenting and preserving are used deliberately to carry produce across seasons, with the chef citing raspberries fermented two years before being served.

Strongest sourceGault&Millau Belgium ↗

Food waste reduction is evidenced through fermentation and preserving, with secondary cuts such as pork trotter and cured lard, and bread, shoots and kefirs made on site.

Food waste reduction is evidenced through a standing fermentation and preserving programme, independently described with a specific example of raspberries fermented two years before service, and through the use of secondary cuts such as pork trotter croquettes and 72 hour cured lard.

The host museum's restaurant page and the Grand-Hornu press material both state that the kitchen works with zero waste techniques, and bread, shoots and kefirs made on site reduce bought in processed inputs.

Strongest sourceTogether Magazine ↗

Species and cuts are named on the menu, including turbot, cod, wild shrimp and secondary cuts like pork trotter, with one shellfish dish sourced from northern waters.

Meat, poultry, fish and shellfish are all served. Species and cuts are named on the menu and in coverage including turbot, cod, wild shrimp, duck, pork fillet, blood sausage and shellfish; one shellfish dish names a northern catch area, and the shrimp is described as wild.

The kitchen positions animal protein as a complement rather than the centrepiece, which is a genuine volume reduction stance. A reviewer independently corroborates sourdough made in house and names pork trotter croquettes and braised cabbage with blood sausage.

Strongest sourceParis Match ↗

The chef frames putting family and community life ahead of maximum earnings as a staffing priority, and an apprentice cook on the team indicates a training place.

Social themes appear in the restaurant's positioning. In an interview the chef frames his choice of a limited service pattern as putting a real life with family and friends ahead of maximum earnings, which is a staff facing stance stated in independent press.

The published team list includes an apprentice cook, indicating a training place. The restaurant also works with its host institutions, the Grand-Hornu museum and the design centre, on joint exhibition and dining offers and on private event hosting in the Grand Auditorium.

Strongest sourceTogether Magazine ↗

Every menu runs in three versions: vegetable, fish or meat at each course, and a complete vegetarian route exists through the full tasting sequence.

Plants are structurally dominant and the positioning is corroborated across partner, guide and editorial sources. The We're Smart Green Guide listing records that the chef always keeps a plant based alternative on the menu for guests avoiding meat and fish. Gault&Millau Belgium describes the cooking itself as precise, daring and plant based.

In a 2026 feature the chef states that he thinks of the vegetables first and looks for the protein afterwards, and the restaurant's own positioning is that vegetables reign, legumes lead the bill and animal protein arrives as a complement rather than the star. Dish evidence includes broccoli in several textures, beetroot with sambal spice, salsify, braised cabbage, courgette with tagetes and asparagus with wild garlic.

Strongest sourceWe're Smart Green Guide ↗

Sourcing signals

✓
In-house preparation
✓
Low-impact beverage program

Bread, fermentations, shoots and three house kefirs are all made and grown on the premises.

The beer list is entirely Belgian microbrewery; wine is sourced from Belgian, French, Italian and Spanish producers.

Visit & practical info
Address, price, and more
Address
Rue Sainte-Louise 82, Boussu, Belgium
Open in Google Maps ↗
Price
€€€
Format
Tasting menu. Reservations essential.
Hours
MondayClosed
Tuesday12:00–14:30
Wednesday12:00–14:30
Thursday12:00–14:30, 19:00–21:00
Friday12:00–14:30, 19:00–21:00
Saturday12:00–14:30
Sunday12:00–14:30
Style
Fine dining
Casual
Cosy
Good to know
Terrace
Private dining room
Wheelchair accessible
Children's menu
Web
rizom.be
Reviewed by My Treats
Last reviewed 15 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.
This place
Recognised Strong practice across four or more dimensions, with independent corroboration.
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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