Preheat your oven to 400°F (200°C).
Spread the frozen tater tots evenly in a 9x13 inch baking dish.
Pour the marinara sauce over the tater tots, spreading it evenly.
Add half of the mozzarella cheese over the sauce layer.
Layer on the pepperoni, bell peppers, and black olives.
Sprinkle the remaining mozzarella cheese and Parmesan cheese on top.
Season with Italian seasoning, sprinkling it across the top.
Bake for 25-30 minutes until the cheese is bubbly and golden brown.
Allow to cool for 5-10 minutes before serving.