Cook the Ground Beef: Start by heating a large skillet over medium-high heat. Add the 1 pound of ground beef and cook until it’s browned and no longer pink, about 5-7 minutes. Don't forget to season with ½ teaspoon of salt and ½ teaspoon of black pepper for flavor! Once cooked, drain any excess grease.

Mix the Casserole Ingredients: In a large mixing bowl, combine the cooked ground beef with the 10.5 oz can of cream of mushroom soup and 1 cup of sour cream. If you’re feeling adventurous, toss in the optional 4 oz can of diced green chiles. Stir the mixture until everything is evenly blended.

Assemble the Casserole: Grab a greased 9×13 inch baking dish and spread the beef mixture evenly across the bottom.

Layer the Tater Tots: Evenly distribute the 4 cups of frozen tater tots over the beef mixture.

Add the Cheese: Sprinkle 2 cups of shredded cheddar cheese generously over the tater tots.

Bake to Perfection: Preheat your oven to 375°F (190°C). Bake uncovered for 35-40 minutes until the cheese is melted and bubbly.

Garnish and Serve: Once baked, let the casserole cool for a few minutes and top with ¼ cup of chopped green onions before serving.