re: Loaded Potato Casserole or other Side for 20?

I don't really follow a recipe for that, though there are plenty of them out there for large quantities. I just make them as I would a bunch of twice baked potatoes, but in a casserole. We usually load the skins with cheese and bacon and bake those for snacking on before dinner. Put out a bowl of sour cream mixed with chives for dipping or topping them.

You could also do Pioneer Woman's crash hot potatoes ahead of time. Boil and smash them the night before and then add the toppings you select just before baking them.

I've been looking at some fennel and potato gratin recipes for something different with steak.