Preheat your oven to 375°F (190°C).

Lightly grease a baking dish using cooking spray or a drizzle of olive oil.

Pat the chicken breasts dry and season both sides with garlic powder, onion powder, dried oregano, salt, and pepper.

In a skillet, add olive oil and sauté sliced bell peppers for about 5 minutes.

Place the seasoned chicken breasts in a baking dish in a single layer.

Spread the sautéed bell peppers evenly over the chicken breasts.

Sprinkle shredded mozzarella and grated Parmesan cheese over the chicken and peppers.

Cover the dish with aluminum foil and bake for 20 minutes.

Uncover and bake for an additional 10-15 minutes until the cheese is bubbly and golden.

Check the chicken's internal temperature, ensuring it reaches 165°F (75°C).

Allow to rest for a few minutes and garnish with fresh parsley before serving.