When life gives you leftover mashed potato, add some simple ingredients and bake a delicious savory! Served hot or cold these Cheesy Potato Pinwheels are a huge family favorite! I've been promising you a savory recipe for a few weeks now, and I finally found a few spare minutes to write the post! These Cheesy Potato Pinwheels might look simple and nothing particularly special, but they're super fun, extremely yummy and a great way to use up any leftover mashed potato from last night's…