If you’re looking for a hearty taste of the past, you’ll get it in one of these 20 retro casserole recipes. Grab your trusty 9×13 baking dish because it’s time to find a new favorite. You’ll find something you love, from custardy French toast casserole and tater to hot dish to Tennessee onions and walking tacos. Don’t forget to read the helpful tips and tricks from our editors and contributors along the way!