Preheat the oven to 400°F (200°C).
Pound the chicken breasts to an even thickness.
In a shallow dish, mix breadcrumbs with grated Parmesan cheese.
Dip each chicken breast in the breadcrumb mixture, coating both sides.
Heat olive oil in a skillet over medium heat.
Cook the chicken until golden brown on both sides.
Transfer the chicken to a baking dish and top with tomato sauce and mozzarella cheese.
Bake in the preheated oven for about 20 minutes or until the cheese is melted and bubbly.
Season with salt and pepper to taste before serving.
