Cheese with other ingredients. A cassarole with out cheese is a pooparole, referring to what it taste like.
Mac doesn't like cassarole because he eats to much pooparole.
Cheese plus other ingredients. Without cheese there is no casserole. It become's a pile of poop that is referred to as a pooparole.
Mac doesn't like cassarole because all he likes to eat pooparole.