*TO MAKE THE SWEET POTATO: Preheat the oven to 400 degrees F. Wash the potato and wrap it in tin foil. Bake for about 20-30 minutes, until soft enough to pierce easily with a fork. Slice in half to cool. (You can make the sweet potato ahead of time and store it in the fridge for a few days until ready to make your Egg in a Hole sandwiches!)