1 cup shredded mozzarella cheese
1 large egg, lightly beaten
1/2 tsp. fresh cracked black pepper
1/2 tsp. kosher salt
2 tbsp. fresh parsley, chopped
2 tbsp. fresh basil, chopped
1/2 tbsp. dried Italian seasoning
1 1/2 cups marinara sauce (divided)
1/2 small onion, grated (or minced)
3 cloves garlic
1 1/4 cups fresh grated parmesan cheese, divided
3/4 cup Italian breadcrumbs
1 pound ground chicken breasts