Baked Spaghetti Casserole

spaghetti

olive oil

ground beef

small onion (chopped)

garlic (minced)

spaghetti sauce (flavor of your choice)

egg

ricotta cheese

shredded parmesan cheese (plus more for topping)

butter (melted and cooled)

shredded mozzarella cheese

shredded monterey jack cheese

shredded cheddar cheese (mild or sharp)

fresh parsley (chopped (optional))

red pepper flakes ((optional))