Preheat your oven to 400°F.
Cook the Italian sausage in a skillet over medium heat until fully browned and cooked through. Drain any extra grease.
Spread the cooked sausage evenly across the bottom of a baking dish. Pour the pizza sauce over the sausage and spread it out evenly. You can also mix the sausage and sauce together if you prefer.
Season with garlic powder, onion powder, Italian seasoning, fennel, salt, and pepper to taste.
Sprinkle the shredded mozzarella cheese evenly over the sausage and sauce mixture.
Line the frozen tater tots in neat rows over the top of the cheese.
Bake for 35 to 40 minutes, or until the tater tots are crispy and golden brown.
Remove from the oven and let it cool for a few minutes before serving.