Preheat your oven to 425°F (220°C).
Spread the frozen tater tots evenly at the bottom of a greased 9x13 inch casserole dish.
Pour the pizza sauce evenly over the tater tots.
Sprinkle the shredded mozzarella cheese generously over the sauce.
Layer the pepperoni, diced bell peppers, and sliced black olives on top of the cheese.
Sprinkle Italian seasoning over the top for added flavor.
Bake in the preheated oven for 25-30 minutes until the tater tots are golden and the cheese is bubbly.
Remove from the oven and let it sit for 5-10 minutes before serving.