Chicken Parmesan Casserole

Name: Chicken Parmesan Casserole
Prep time: 20 min
Cook time: 25 min
Total time: 45 min
Cuisine: American
Ingredients: 4 cups (about 1 1/2 pounds) fully-cooked chicken, shredded or cubed (see Cooking Notes for how to cook the chicken); 1 jar (about 28 ounces) of marinara sauce (or make your own); 1/2 cup shredded or grated Parmesan cheese; 1 1/2 cups shredded mozzarella cheese; 1 cup Panko or whole wheat bread crumbs (Here is how to make your own) (Gluten-Free Option: Use gluten-free breadcrumbs or almond meal instead.); 1-2 tablespoons olive oil; 2-4 tablespoons of chopped fresh parsley (or 1 tablespoon dried parsley); salt and pepper, to taste