01 -
Preheat oven to 400°F (200°C). In a large skillet, brown ground beef over medium-high heat, breaking into small crumbles. Once cooked, add chopped onions and sauté until soft and translucent, about 5-7 minutes. Stir in ketchup and mustard, then remove from heat.
02 -
Grease a 9x13-inch baking dish with nonstick spray or butter. Spread cooked beef mixture evenly in the dish.
03 -
Sprinkle shredded cheddar cheese evenly over the beef layer. Arrange frozen tater tots in a single layer covering the cheese completely.
04 -
Bake in the preheated oven for 25-30 minutes or until tater tots are golden brown and crispy. Monitor to prevent overcooking.