Easy Cheesy Pork Chops Pork chops Thin yellow onion slices Mayonnaise Parmesan cheese Preheat oven to 350. Place chops into lightly greased casserole dish. Place a slice of onion on top of each chop. Spread mayonnaise on top of onion and then sprinkle liberally with Parmesan cheese. Bake for 45 minutes to 1 hour, or until done.