4 - Recognised
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SLA partners with Vytal, a deposit-free reusable container system recognised as a case study by the Dutch Ministry of Infrastructure and Water Management for reducing single-use plastic in hospitality. Where disposable packaging is needed, the restaurant uses biodegradable materials including cardboard, pulp, and recycled plastic. Juices are served in reusable glass bottles, and the central kitchen uses reusable containers in its own supply chain. Vegetables and fruit are sourced at least 90% organic from Dutch suppliers, with all meat and poultry stated to be 100% organic by independent editorial coverage. The menu's plant-forward composition, with roughly 75% of dishes fully vegan, reduces the environmental footprint of each meal. Seasonal menu rotation supports ingredient sourcing aligned with Dutch growing cycles.
The impact dimensions
Low waste & circular practices✓
Sustainable animal products✓
At least 90% of vegetables and fruit come from Dutch certified organic suppliers, with named sourcing for juice, plant-based proteins, poultry, and beverages.
SLA declares a policy of sourcing 'as much as possible from certified organic suppliers in the Netherlands.' Independent editorial (Amsterdam Flavours) corroborates that vegetables and fruit are at least 90% organic and all meat and poultry are organic.
Named suppliers provide traceability for key categories: Sapje supplies Dutch cold-pressed juices blended from at least 70% organic vegetables, De Vegetarische Slager provides Dutch plant-based protein toppings, chicken comes from Oostkappelle in Zeeland, and beer and coffee are sourced regionally or with fair-trade certification.
The central kitchen model supports consistent sourcing practices across all locations. However, no comprehensive published supplier list quantifies the local percentage across all ingredients—avocados and some other items are sourced internationally.
The menu rotates biannually (spring/summer, autumn/winter) with seasonal products as a stated priority.
SLA operates a regular seasonal menu rotation at minimum twice per year (spring/summer and autumn/winter offerings), with a stated priority to build menus around seasonal availability. The current menu is described as 'filled with seasonal products purchased sustainably and fairly, and as much as possible from local sources.'
Independent editorial (Amsterdam Flavours) confirms that SLA 'constantly strikes the balance between quality, locality and the seasons,' providing third-party corroboration for seasonal practice.
The central kitchen model supports flexible daily preparation, enabling responsive sourcing aligned with Dutch growing cycles. No archived menus documenting the rotation history are publicly available.
SLA partners with Vytal, a QR-coded reusable container system, and uses biodegradable packaging where disposables are needed.
SLA has partnered with Vytal, a deposit-free digital reusable container system, featured as a case study on the Dutch Ministry of Infrastructure and Water Management website for reducing single-use plastic in hospitality. Vytal's QR-coded containers achieve a 99.3% return rate globally.
Where disposable packaging is necessary, SLA uses biodegradable materials—cardboard, pulp, and recycled plastic. Cold-pressed juices are served in reusable glass bottles, and the central kitchen uses reusable containers in its own supply chain, consulting with suppliers on further reduction opportunities.
The scope of documented practices is strong in the plastic and packaging sub-area, with government-level corroboration. Food waste management, energy practices, and formal environmental certifications are not documented.
All poultry is 100% organic and sourced from Oostkappelle in Zeeland. Fish sourcing is not documented.
SLA reintroduced meat to its menu in January 2024 after a period as a fully plant-based kitchen. Independent editorial (Amsterdam Flavours) reports that all meat and poultry served is 100% organic. Chicken is traceable to Oostkappelle, Zeeland.
Fish appears on the menu (Sesame Ginger Salmon Bowl), but no sourcing information, welfare certification (MSC, ASC), or named supplier is documented. SLA's own FAQ notes that not all ingredients carry formal organic certification, creating ambiguity around the Amsterdam Flavours claim of 100% organic sourcing for all meat and poultry.
The score reflects partial traceability for poultry but no substantiation for fish, falling short of the coverage threshold for a higher score.
SLA organises community workshops on food as medicine, mindful eating, and home gardening, and published a cookbook to promote healthier eating.
SLA positions itself as 'forward-thinking, impact-driven' with a stated mission to 'make the world a bit more healthy and sustainable.' The restaurant organises community workshops on food as medicine, mindful eating, and home gardening initiatives, and co-founder Nina Pierson published a cookbook titled 'SLA: taste the magic of veggies' to inspire readers toward healthier eating at home.
Staff benefit from complimentary access to the full menu, and structured detox packages are available to guests interested in intentional nutrition support.
While these activities demonstrate social engagement, no named charitable partnerships, community donation programmes, or social enterprise certifications (B-Corp or equivalent) have been documented.
Roughly 75–80% of dishes are vegan; all desserts have plant-based versions, and vegetables are the explicit centre of the kitchen.
SLA self-identifies as 'mostly plant-based and often vegan and gluten-free,' positioning the kitchen as 'an exuberant celebration of roasted, steamed and peeled vegetables.' The menu structure reflects this: 15+ vegan dishes and 3+ vegetarian dishes out of 19–21 total offerings, reaching approximately 75–80% vegan composition and over 90% vegetarian. Vegan items are marked with a plant symbol on the menu.
Independent sources corroborate the plant-forward identity. RestauPlant lists the menu's composition, Uber Eats confirms the vast majority of dishes are plant-based, and Lonely Planet describes SLA as a 'super-stylish salad bar.' Animal proteins (chicken, salmon) appear in only a handful of items—minimal, optional additions rather than menu anchors.
Plant-based protein alternatives supplied by De Vegetarische Slager are available, and desserts include fully vegan options. Vegetables are unambiguously the organising principle of the kitchen.
