I had a whole piece written (see below) about Canadian foods you could make, but it felt disjointed and wasn't really a helpful menu. If it were me, I would be making the
Le Cellier Canadian Cheddar Cheese Soup recipe (I have made it before and it turns out great). You can serve it with a side of bannock (a kind of fry bread), if you really wanted to, or just use any kind of baguette and pretend it is from Quebec. Serve a Canadian Caesar salad (see below), and then choose either Nanaimo Bars or butter tarts for dessert. That's it. Serve some Canadian beers or rye and Coke or whatever else you fancy. Hope this helps. Enjoy the game!
Okay, here is what I originally wrote, just in case you want to delve into some other stuff.
Honestly, there are so many Canadian dishes to choose from, but many of them revolve around items that require being in Canada to access the ingredients, like Saskatoon berries, Alberta beef, Arctic char, PEI potatoes, etc. I'm going to avoid saying poutine, but will try to give you some options, as well as suggesting an array of red and white foods instead of/in addition to, like Caprese salad, baked pasta in a red sauce, vanilla ice cream with strawberries, etc. It might make things easier.
Main dishes: Tourtiere pie from Quebec, BC salmon, donairs, bison burgers, PEI mussels
Side dishes: Kraft Dinner (what we call KD...seriously, it is the most popular grocery store item in the country), bannock from the First Nations people, a Canadian Caesar salad, which is like a regular Caesar salad, except you add bacon bits to it.
Drinks: Caesars (not my favourite, but they are Canadian) or ice wine
Desserts: Nanaimo bars are a great no-bake dessert from British Columbia; butter tarts are also Canadian and sooooo good; home-made
beaver tails (a fried dough that is spread with whatever toppings you like, such as Nutella)
See also:
21 Canadian Foods and
50 of the Most Canadian Foods.