Preheat the oven to 350°F.
Heat a large skillet over medium and add the ground beef. Season to taste with garlic salt and pepper. Cook until browned about 7-10 minutes. Drain excess fat.
Add the can of cream of chicken and mushroom soup to the pan with the ground beef and stir until evenly coated.
Spread the mixture into a 9×13 baking dish. Add a layer of chopped green beans on top of the beef. Then, add a layer of corn.
Next, add a layer of tater tots so they completely cover the mixture underneath, then top with shredded cheese.
Bake for 30-40 minutes. The casserole mixture should be hot and tater tots will be a golden brown.