In a large skillet over medium-high heat, brown the ground beef and diced onion for 8-10 minutes until fully cooked. Drain excess grease.
Add minced garlic to the skillet and cook for 1 minute until fragrant.
Stir in the cream of mushroom soup, milk, dried parsley, salt, and pepper. Simmer for 2-3 minutes until the sauce is smooth and thick.
Pour the beef mixture into a prepared 9x13 inch baking dish and spread evenly.
Arrange frozen tater tots in a single layer over the beef mixture. Sprinkle shredded cheddar cheese evenly on top.
Bake for 20-25 minutes until tater tots are golden brown and cheese is bubbly.
Optional: broil for 1-2 minutes for extra crispiness, watching closely to prevent burning.
Let rest for 5 minutes before serving.
Notes
Drain the grease from the beef to prevent a soggy casserole. Avoid overcrowding the tater tots so they crisp properly. For a lighter version, substitute ground turkey. For a vegetarian version, swap the meat for sautéed mushrooms and bell peppers. Leftovers keep refrigerated up to 3 days, or freeze unbaked for up to 2 months.
Keyword dinner recipe, ground beef casserole, John Wayne casserole, tater tot casserole