Shepherd's Pie is widely available in Canada. Some branded (M+M), Compliments), some made in-store. Home-made is better, since it can be layered casserole style to make a truly tasty main course.

We used to make it many years ago in New Mexico, often an in-camp dish in iron pan.
Just a mixture of ground beef (lamb is better), green peas and/or corn, slivered carrot, some crushed garlic, perhaps a touch of A-1 Sauce in the mix, with a topping of mashed potatoes (to which we often added diced chives). Some smashed Garlic in the mix or that garlic in the little glass bottle.
Bottom crust, bake in oven or covered on stove top. We used a rectangular pan.

Some of the better recipes at allrecipes.com, but easy to make with what is on hand.