Preheat the oven to 350°F (175°C).

In a skillet over medium heat, cook the ground beef until browned. Drain excess fat.

In a mixing bowl, combine the cooked beef, cream of mushroom soup, sour cream, garlic powder, onion powder, salt, and pepper. Mix well.

Stir in the mixed vegetables and 1 cup of cheddar cheese.

Spread the beef mixture evenly in a 9x13 inch baking dish.

Top with tater tots in a single layer.

Sprinkle the remaining cheddar cheese on top of the tater tots.

Bake in the preheated oven for 30-35 minutes, or until the tater tots are golden brown and crispy.

Let cool for a few minutes before serving.