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Buiten bij de Sluis Food Identity independently researched
Food Identity independently researched Researched

Buiten bij de Sluis

All-day foodbar in the former lock keeper's house on the Amsterdam-Rhine Canal, working with local and seasonal produce.

The essentials, at a glance

AllergiesNot published Ask the kitchen ahead
Documented practices
Independently
researched
Local sourcing
Seasonal cooking

Style
Casual
Good to know
Bar

The delicious details

Buiten bij de Sluis occupies the former lock keeper's house at Oude Vleutenseweg 2 in Utrecht's Leidsche Rijn district, set on the bank of the Amsterdam-Rhine Canal. Owners Melanie Louwers and Willem van Weert run the space as an all-day foodbar, with chef Marijn working with locally sourced and seasonal ingredients. The drinks programme features local wines alongside local, organic and craft beers, sourced through the Lokalist platform.

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

All-day foodbar with a menu built around local and seasonal ingredients. Meat and fish feature on the menu, but sourcing practices for animal products are not publicly detailed.

Impact score
How this restaurant rates
2 - Engaged

Buiten bij de Sluis sources ingredients through the Lokalist platform, which connects restaurants to regional producers.

The drinks programme features local wines and local, organic and craft beers.

Kitchen preparation is carried out in-house.

The impact dimensions
Local & direct sourcing✓
Seasonal cooking✓
Low waste & circular practices
Plant-forward menu

The restaurant sources local ingredients through the Lokalist platform, which connects it to regional producers.

Buiten bij de Sluis uses the Lokalist platform, a dedicated regional sourcing network, to source local ingredients for its all-day foodbar.

No individual farm or producer names are disclosed, but the platform connection demonstrates a structured commitment to local sourcing.

Strongest sourcebuitenbijdesluis.nl ↗

The menu reflects seasonal produce availability through local sourcing via the Lokalist platform.

The restaurant's all-day foodbar format creates space for seasonal menu adaptation, supported by its local sourcing orientation.

Seasonal ingredients arrive through the Lokalist platform connection to regional producers, enabling a menu that follows seasonal availability.

Strongest sourcebuitenbijdesluis.nl ↗

Specific waste-reduction practices are not publicly documented.

Local and seasonal sourcing through the Lokalist platform suggests environmental consciousness, though specific waste-reduction, composting, or circular-economy commitments are not publicly communicated.

Strongest sourcebuitenbijdesluis.nl ↗

The all-day foodbar emphasises vegetable-forward dishes alongside meat and fish options.

The menu's all-day foodbar format creates space for vegetable-forward cooking. The sourcing focus on local and seasonal produce supports plant-forward menu development.

Meat and fish are offered, indicating a mixed menu rather than fully plant-forward positioning, but the infrastructure and sourcing foundation support meaningful plant-forward engagement.

Strongest sourcebuitenbijdesluis.nl ↗
Sourcing signals
✓
In-house preparation
✓
Low-impact beverage program

Kitchen preparation is carried out in-house.

Local wines and local, organic and craft beers are sourced through the Lokalist platform.

Visit & practical info
Address, price, and more
Address
Oude Vleutenseweg 2, 3541 BE Utrecht, Utrecht, Netherlands
Open in Google Maps ↗
Format
All-day foodbar
Hours
MondayClosed
Tuesday11:30–22:00
Wednesday11:30–22:00
Thursday11:30–22:00
Friday11:30–23:00
Saturday11:30–23:00
Sunday11:30–21:00
Style
Casual
Good to know
Bar
Web
buitenbijdesluis.nl
Reserve a table
Reviewed by My Treats
Last reviewed 21 Jul 2026
To website
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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 a planet rating 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.
This place
Endorsed Meaningful practice across three or more dimensions.
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.

Ratings of four or five planets 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
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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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