Preheat your oven to 375°F (190°C) and grease a 9x13 inch casserole dish.

In a large skillet over medium heat, brown the ground beef. Add diced onions and cook until softened. Season with salt, pepper, and optional spices. Drain excess fat.

Stir in cream of mushroom soup and sour cream, mixing well with the beef. Cook for 2-3 minutes until heated through.

Spread the beef mixture evenly across the bottom of the prepared casserole dish.

Sprinkle 1 cup of shredded cheddar cheese over the beef mixture.

Arrange frozen tater tots in a single layer on top of the cheese.

Bake for 25-30 minutes, or until tater tots are golden and crispy.

Remove from oven and top with remaining 1 cup cheddar cheese. Return to oven for 5 minutes until cheese melts.

Let casserole cool for 5 minutes before serving.