Preheat oven to 375 degrees
Grease 9 x 13 baking dish and set aside.
In medium frying pan, add beef and chopped onion and cook until beef is brown. Drain excess grease.
1 pound ground beef, 1/2 white onion
Add garlic, salt, pepper, and worcestershire sauce and mix together.
2 cloves garlic, salt and pepper, 1 Tablespoon worcestershire sauce
Pour meat mixture in bottom of baking dish.
In small mixing bowl, combine cream of mushroom soup and milk and whisk together until combined and smooth.
10 ounces can cream of mushroom soup, 1/2 cup milk
Top beef with soup mixture, green beans, corn, and 1/2 of the cheddar cheese. Season with salt and pepper.
15.2 ounces can corn, 15.2 ounces can green beans, 2 cups cheddar cheese
Top with an even layer of tater tots.
32 ounces tater tots
Bake for 35-40 minutes.
Top with remaining cheddar cheese and cook for 5 more minutes until cheese is melted. Serve warm.