Tater tot hotdish is an old-school, family-friendly Minnesota classic weeknight dinner. You might call it a casserole, but we Minnesotans call it a hotdish.
Preheat oven to 450 degrees F.
In a skillet, cook the ground beef until no longer pink. Place the cooked beef in a large bowl and drain the grease. Set the beef aside. In the same skillet, sautee the onions and garlic until softened, about 5 minutes.
Add the sauteed onions and garlic to the bowl with the ground beef and stir. Stir in the cream of mushroom soup, cream of chicken soup, corn and peas. Mix until well combined.
Evenly spread the mixture into a 9x13 casserole dish. Sprinkle one cup of cheese on top of the mixture. Place tater tots on top of the casserole, covering the top entirely.
Cook the casserole in a 450 degree oven for about 30 minutes, until bubbly and the tater tots are golden brown and crispy on top. Sprinkle the remaining cheese on top and bake until the cheese is melted, about five minutes.