Preheat your oven to 375°F (190°C) and line a baking sheet with parchment paper for easy cleanup.
Pat the chicken breasts dry with paper towels. If they are uneven in thickness, consider pounding them to ensure even cooking. Season both sides with salt and pepper.
In a medium bowl, combine the breadcrumbs, grated Parmesan cheese, chopped parsley, chopped basil, garlic powder, onion powder, dried oregano, and a pinch of salt and pepper. Mix well until all ingredients are evenly combined.
In another bowl, crack the eggs and whisk them until they are fully combined.
Dip each chicken breast into the egg wash, letting any excess drip off. Then, press the chicken into the breadcrumb mixture, ensuring that each piece is well-coated on both sides with the herb crust. Place the coated chicken breasts on the prepared baking sheet.
Spray the crusted chicken breasts lightly with olive oil spray (or drizzle with olive oil if preferred). Bake in the preheated oven for about 25-30 minutes or until the chicken is cooked through and the crust is golden brown.
Remove the baking sheet from the oven. Spoon marinara sauce evenly over each chicken breast, then top with shredded mozzarella cheese. Return to the oven and bake for an additional 5-10 minutes, or until the cheese is melted and bubbly.
Once the cheese is melted and slightly browned, remove the chicken from the oven. Let it rest for a few minutes, then garnish with additional fresh herbs if desired. Serve hot.