Prepare recipe and turn into a baking or microwave-safe dish that will hold at least 10 cups (2.5 L). Cover and refrigerate up to 2 days. To reheat, cover potatoes with foil and bake at 350F (180C) until hot, about 40 min. Or loosely cover and microwave on medium-high until hot, from 8 to 10 min. Stir halfway through.