If you’re making this ahead, refrigerate in an airtight container for 1-2 days. The day you want to eat, put the hash in a cast iron skillet or baking dish and reheat at 350 degrees F for 10-12 minutes. If you want to bake the eggs in the same dish, make “nests” in the hash for each of the eggs and add them there, then bake for 10-20 minutes, depending on how you prefer your eggs. Check on them – when baking eggs, they can fool you into thinking the whites are done … or that the yolks are still runny.