Step 1: Preheat your oven to 400°F (200°C).
Step 2: Using a meat mallet or rolling pin, gently pound the chicken breasts to an even thickness, about ½ inch.
Step 3: In one mixing bowl, combine the breadcrumbs, grated Parmesan cheese, garlic powder, oregano, basil, salt, and pepper. In another bowl, beat the eggs until smooth.
Step 4: Dip each chicken breast first into the beaten eggs, then into the breadcrumb mixture, pressing down to ensure the coating sticks.
Step 5: Lightly spray the baking dish with olive oil and place the coated chicken breasts in the dish.
Step 6: Pour the marinara sauce evenly over the chicken, then sprinkle the shredded mozzarella cheese on top.
Step 7: Bake for 25-30 minutes or until the chicken is cooked through and the cheese is bubbly and golden.
Step 8: Remove from the oven and let it rest for a few minutes before slicing.