Spaghetti pie was born out of a need to reuse leftover spaghetti, but that also means it makes for a great meal to prep ahead of time. It’s also a kid-friendly way to serve spaghetti at the dinner table. It’s not nearly as messy as a big bowl of soup-covered pasta, and slicing it into wedges makes it a fun and simple weeknight meal. Even better? It freezes really well, so any leftovers can be packed up for a quick dinner on an upcoming busy night.