4 - Recognised
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L'Air de Rien's sourcing starts with the restaurant's own forest garden, where the chef grows the vegetables, fruits, flowers and herbs that run through the menus. What the garden cannot supply comes from small producers in the surrounding area, with named farms providing dairy and beef.
The menu is rewritten month by month, so dishes follow what the garden and the nearby growers have at that point: beetroot with elderflower in September, apple and fennel to close. Preservation keeps the seasons in the kitchen: lacto fermentations, misos, garum, oils and pickles are made in house and carried forward across the year.
Vegetables are treated as the substance of the cooking rather than an accompaniment, an approach recognised by the We're Smart Green Guide, which lists the restaurant for its vegetable led kitchen.
The impact dimensions
Low waste & circular practices
Sustainable animal products
Local and direct sourcing is the organising principle of the kitchen, corroborated by independent guides and named producers across multiple categories.
Local and direct sourcing is the organising principle of the kitchen. The Michelin Guide records main ingredients as largely locally sourced, and Gault&Millau describes a partnership with local producers. The We're Smart Green Guide confirms herbs, flowers, vegetables and fruits from the chef's own garden and from small producers in the surrounding area.
Named producers appear across categories: Ferme France at Fays for dairy, Lothar Vilz's Limousin herd for beef, and Les Brasseries de Liège for beer. Sources naming these suppliers date from 2020 to 2023; the current practice is confirmed by recent independent guides.
Menu published monthly and rewritten to follow the season: September features tomato and marigold, beetroot, beans and apple.
The restaurant publishes its menu as a dated monthly document. The current September 2026 menu carries courses built around tomato and marigold, beans with fermented honey, beetroot with elderflower, sweetcorn, and apple and fennel, matching produce available in that month.
The restaurant states it serves no choice of dishes, only a surprise menu reflecting the season and the chef's finds. Independent guides corroborate seasonal intentionality: Gault&Millau describes a locavore kitchen, and Michelin notes seasonal preparations such as celeriac baked in a salt crust.
Strongest source lairderien.be
In-house preservation programme: lacto fermentations, misos, garum, oils, macerations, drying and pickles held and used across the year.
The restaurant operates a preservation and fermentation programme at scale: lacto fermentations, misos, garum, oils, macerations, drying and pickles made in house. Fermented butternut and plums are held in jars, miso is made from peas, koji and umami emulsions are produced, and fruit and vegetable waters are made.
Michelin independently records fermentation as a defining technique of this kitchen, corroborating that this is established practice in daily use rather than aspirational framing.
Beef from Limousin herd, fish by small boats; foie gras on the menu.
Beef is sourced from Lothar Vilz's Limousin herd and dairy from Ferme France at Fays. Fish is sourced by small boats, and the menu names langoustine, trout, turbot, sea bream and mussels.
Foie gras appears on the current menu as the signature dish. No animal welfare certification, MSC or ASC label, or organic certification was found for the meat, fish or dairy.
Strongest source lairderien.be
Joined Generation W collective in 2016; small, settled team.
The chef joined Generation W in 2016, the Walloon gastronomic collective founded to promote Walloon creativity, its producers and its know-how. Current membership could not be confirmed from the collective's own channels.
The restaurant operates with a small settled team that knows and trusts each other. Bertrand Stiennon is named as the chef's business partner and full collaborator.
Vegetables as the substance of the cooking; vegetarian menu on request; foie gras on the regular menu.
The We're Smart Green Guide recognises the chef as a vegetable chef, and records that the ordinary discovery menu carries fully plant-based dishes. Gault&Millau describes vegetable-forward plates. The restaurant's own forest garden feeds vegetables, fruits, flowers and herbs into the menus.
A full parallel vegetarian menu is available on request. The September 2026 regular menu is a mixed sequence with vegetable and fruit led courses alongside animal proteins: langoustine, trout, pork collar and the signature dish of foie gras.
Sourcing signals
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Direct named-farm sourcing
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Low-impact beverage program
The chef grows vegetables, fruits, flowers and herbs in a forest garden on site, used across the menus.
Named suppliers: Ferme France (dairy), Lothar Vilz (beef), Les Brasseries de Liège (beer).
Lacto fermentations, misos, garum, koji and umami emulsions made in house; fermentation is a defining technique.
Natural wines favoured: Les Vins Pirouettes, Les Foulards Rouges, Les Marnes Blanches; local beer from Les Brasseries de Liège.
