01 - Preheat oven to 400°F.
02 - Lightly grease a large baking dish with 1 tablespoon of olive oil.
03 - Arrange sliced bell peppers and red onion evenly in the dish. Drizzle with the remaining olive oil, and sprinkle with half the salt, pepper, Italian seasoning, and paprika. Toss to coat.
04 - Pat chicken breasts dry and season both sides with the remaining salt, pepper, Italian seasoning, and paprika. Place the chicken breasts on top of the vegetables.
05 - Sprinkle minced garlic evenly over the chicken and vegetables.
06 - Cover baking dish with foil and bake for 20 minutes.
07 - Remove foil, sprinkle mozzarella and Parmesan cheeses over the chicken breasts, and return to oven. Bake uncovered for an additional 10 minutes, or until chicken is cooked through and cheese is melted and golden.
08 - Remove from oven and let rest for 5 minutes before serving.