Preheat your oven to 375°F (190°C) and position the rack in the middle.
Season both sides of each chicken breast with garlic powder, salt, and pepper for added flavor.
Heat the olive oil in a skillet over medium-high heat. Once hot, sear the chicken breasts for 5 minutes on each side until golden brown. This step locks in the juices, making the chicken tender.
Transfer the seared chicken to a greased 9x13 baking dish. Make sure they are evenly spaced for proper cooking.
Pour the marinara sauce over the chicken, using a spoon to spread it evenly around and on top for maximum flavor.
Sprinkle the grated Parmesan cheese over the chicken, followed by the shredded mozzarella cheese. The mixture of these cheeses will create a delightful crust.
Bake uncovered for 20 minutes. If your chicken breasts are smaller, check for doneness at 15 minutes to avoid overcooking.
For a deliciously browned cheese topping, broil the chicken for a few minutes, keeping a close eye to prevent burning. This step adds a nice texture to the cheese.
Let the chicken rest for 5 minutes before serving to ensure it stays juicy. Remember, chicken is safe to eat when it reaches an internal temperature of 165°F (74°C).
Notes
For added flavor, consider mixing in some Italian herbs with the marinara sauce. Serve with a side of pasta or a fresh salad for a complete meal.