Preheat oven to 425°.
Wash and steam your green beens to a bright green color making sure not to overcook them.
Meanwhile, in a large skillet, sauté your onion and brown your beef.
Once beef is fully cooked, discard excess fat and place in large mixing bowl.
Add 1-10 oz. can cream of mushroom soup, 1-10 oz can cream of chicken soup, 1/2 cup milk, 1/3 cup sour cream, 1/2 cup cheese, 1 tsp. garlic powder. Salt and pepper to taste.
Add steamed green beans and mix until combined.
Pour into large baking dish and add the tater tots on top. Making them into straight lines.
Bake for 30-40 until tater tots are crispy.
Add extra cheese to the top.
Melt and serve.