Preheat the oven to 350 degrees F. Spray an 8x8 baking dish with cooking spray. Cook the ground beef in a skillet until browned. Drain any grease, then add the bell pepper, onion, and garlic. Sauté until softened.
Stir in the pizza sauce and red pepper flakes.
Spread the mixture in the baking dish. Top with parmesan, dollops of ricotta, and mozzarella cheese.
Layer on the turkey pepperoni.
Bake 20-25 minutes or until the cheese is melted and golden.
Garnish with fresh basil and serve hot.