Cheesy Chicken Shells

shell(s) uncooked jumbo shells

cup(s) canned tomato sauce

large egg white(s) lightly beaten

cup(s) part-skim ricotta cheese

roasted skinless boneless chicken breast diced

cup(s) chopped frozen spinach thawed and drained of excess water

garlic powder

ground oregano or other Italian seasoning

cup(s), shredded part-skim mozzarella cheese shredded

cup(s) grated Parmesan cheese