Cowboy Casserole  adapted from a recipe at Taste of Home  1 1/2 pounds ground beef (I used 80/20)  1 medium onion, chopped  3 cloves garlic, chopped  1 can (15.25oz) whole kernel corn, drained  1 can condensed cream of mushroom soup  2 cups cheddar cheese, shredded  1/2 cup milk  4 tablespoons sour cream  1 bag (30 oz) frozen tater tots (I used Ore-Ida Crispy Crowns)
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