Leftover Use-up: One-Pot Fish Tacos Casserole Recipe, Quick and Easy I'm a penny-pincher, DIY mama. The kitchen is one of my favorite places to scratch both of those itches. I save money by cleaning out the fridge before shopping (funny how those kids can open six packages of shredded cheese and never finish one? Or the hubs starts three onions and leaves the carcasses behind?) So once a week I go through, purge the refrigerator of flotsam and jetsam and make a meal of the leftovers. Today's leftover use-up: fish tacos. I make them into a casserole because it saves dishes and messy clean up. Here's how...