Asparagus Chicken Casserole with Mozzarella

 large chicken breasts, cut in half length-wise

asparagus stalks, trimmed

shredded mozzarella cheese

garlic powder

teaspoon paprika

Salt and fresh cracked black pepper,

extra-virgin olive oil

lemon juice + lemon zest (zest is optional)

Fresh chopped parsley, for garnish

Red chili pepper flakes, optional