A petit fast cafeteria style restaurant with wine and beer, plentiful patio space surrounded by beautiful garden backdrops. Even better-- it's open to the public, so no admission needed! Restaurant du Jardin's located just before the ticketed entrance of the Botanical Gardens.
We couldn't have had a better lunch after exploring Le Stade. A feast for the eyes after walking around blah beigey concrete all morning. Since it was raining on and off throughout the day, we took refuge inside the restaurant. Between the three of us, we split the meat and veggie entree of the day (poulet/chicken and a falafel-like croquette), plus the soup du jour (tomato). Both entrees were flavorful, plated beautifully with fresh greens. I'd expect no less given its surroundings.
Inside seating was limited by four tables and counter seats. On a nicer day, I'd see people spilling out onto the patio. I highly recommend stopping by for a bite if you're ever around Parc Olympique!