These are easy to make the day before & then just reheat them. Don’t freeze them, because potatoes get weird if they’ve been frozen. Rubbery. Not good.
It’s just easier to make these the day before your big meal than to make potatoes at the same time you are working on the rest of the meal.
Click title for link at FrugalUpstate. These are very yummy with just about any kind of meat. The kids call them cheesy potatoes.