re: Loaded Potato Casserole or other Side for 20?

We use the frozen shredded hash browns for that. The wife makes it great. She dices yellow onions and sautés it in butter. Then she adds sour cream, cream of chicken soup, shredded Colby Jack cheese, and mixes it all in with the frozen potatoes. Usually makes it the day before and lets it sit in the fridge until we bake it. Sometimes we do toppings, like crushed Ritz or Corn Flakes. Sometimes we'll add chopped cooked bacon or sausage to it, but that's more for breakfast casserole. The base is always the same, just change what meat/toppings you want.