Preheat the oven to 375°F (190°C) and grease a 9×13-inch baking dish.
Cook the sausage, onion, and bell pepper in a skillet until the meat is browned. Drain away any excess grease.
Whisk the eggs, milk, garlic powder, salt, and black pepper in a large bowl.
Spread the sausage mixture in the dish and add the cheddar. Pour the eggs over everything, then arrange the frozen tater tots across the top.
Bake for 45 to 50 minutes, until the eggs are set and the tater tots are crisp and golden.
Sprinkle with green onions and rest for 10 minutes before slicing. Cool freezer portions completely before wrapping.
