Chicken Parmesan Stuffed Shells

large skinless boneless chicken breasts

Salt/pepper,

large eggs, beaten

all-purpose flour

breadcrumbs

vegetable oil

box jumbo pasta shells

shredded mozzarella cheese, divided

Parmesan cheese, divided

garlic, minced

basil, chiffonade

red pepper flakes (optional)

jar marinara sauce

Cooking spray