Preheat oven to 375°F (190°C).
Divide cooked quinoa evenly between oven-safe bowls or ramekins.
Top with pizza sauce, mozzarella cheese, pepperoni, olives, and bell peppers.
Sprinkle with Italian seasoning.
Bake for 10-12 minutes until the cheese is melted and bubbly.
Garnish with fresh basil if desired. Serve warm.