Storage: Refrigerate leftovers in an airtight container for up to 3 days. Reheat gently on the stove, adding a splash of milk if the soup has thickened too much.
Substitutions: You can use leftover baked potatoes or mashed potatoes to save time. For a lighter version, substitute half-and-half for the milk.
Tip: For extra creaminess, use a potato masher to partially mash the potato flesh before adding it to the soup, leaving some chunks for texture.
Variation: Add cooked diced ham or chicken for additional protein.