Mathys had previously served as head chef at the well-regarded Montreal fine dining restaurant Manitoba, which closed in the early stages of the pandemic. He cited the closure of Manitoba as a catalyst for accelerating his long-standing goal of opening his own restaurant, providing him with an opportunity to establish a new culinary concept under his own direction.[3]
At its opening, the restaurant offered a three-course tasting menu priced at 35 CAD, aimed at attracting guests from the local neighbourhood. This approach was in part a response to the severe restrictions on travel into Quebec from other provinces, which limited the potential customer base and emphasized the importance of appealing to nearby diners.[3]
Mathys selected the restaurant's name from the French word meaning "big and brawny".[2]
Concept
The restaurant serves a regularly changing five-course tasting menu, with a significant focus on Quebecois ingredients and flavours.[4]
Mastard offers an optional wine pairing and a wine list made of privately-imported bottles, featuring items not often sold at Quebec's state-owned alcohol board.[2]
Recognition
In 2025, the restaurant received a Michelin star in Quebec's inaugural Michelin Guide. Michelin praised chef Simon Mathys's "unabashedly original carte blanche menu" and use of scientific precision in the dishes served.[5]
Mastard was ranked #2 in Air Canada's annual list of 10 best new restaurants in Canada in 2022. Air Canada highlighted the restaurant's emphasis on "local, farm-fresh ingredients" in its cooking.[6]
Writing for Maclean's Magazine in 2023, restaurant critic Chris Nuttall-Smith ranked Mastard among the 20 best places to eat in Canada. He cited chef-owner Mathys's food as "playful, original [and] exhilarating", praising the chef as "a soft-spoken star [in Quebec's] culinary scene".[4]
Canada's 100 Best Restaurants Ranking
The restaurant has appeared on Canada's 100 Best Restaurants ranking annually since debuting on the list in 2022. Mastard peaked at #40 in the latest ranking in the 2025 edition.[7]
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