Cut the chicken breasts in half widthwise to make 4 thin breasts.
2. Step
Season the chicken with salt, pepper, and onion powder.
3. Step
Coat the chicken in flour, then egg, and then bread crumbs.
4. Step
Pour oil in a cast-iron skillet to come ¼ inch (½ cm) up the side. Heat the oil over medium-high heat. Add the chicken and fry on both sides until brown, about 4 minutes.
5. Step
Transfer to a paper towel-lined plate to drain.
6. Step
Preheat oven to 450°F (230°C).
7. Step
Place the fried chicken breasts in a baking dish. If they don’t fit side by side, gently overlap them. Pour the marinara over the chicken.
8. Step
Top with mozzarella slices and Parmesan.
9. Step
Bake for 10-15 minutes, or until the cheese is browned and bubbling.
