This is a simple 8 ingredient recipe. You probably have all the ingredients on hand for that last minute thought of having something just a little bit different. Easy recipe for beginners or those who have been cooking for sometime. I usually use less sour cream than called for, more bacon fat, and also salt & pepper the potatoes after they have been added in addition to adding salt & pepper to the sauce. Some times I don't use the parsley. Recipes are meant to be altered according to your taste. Feel free to do so. No need to add broth or any kind of liquid as this cooks up quite nicely as is. It's the low heat that eliminates the need for liquids.