What is your favourite recipe to use up the leftovers in the fridge? Something that the kids love too?

I loveee re creating food! Pasta and casserole are the easiest do over food i usually do. Example: if i have bbq at night and have some leftover meat, i made it as ravioli's feeling. If you want to make it for your kids, just add their favorite sauce such as cheese or tomato paste. Yummm!