Spread four slices with butter and pre heat toaster. Then break an egg in a container, place 2 buttered side of the bread on the hot plate of the toaster and pour the egg on the bread, half egg per slice. Then cover with the other slices while the buttered side faces upward so as to get toasted by the cover hot plate. Close the toaster and allow to toast for minutes then turn of and serve.

You can add anything inside the bread as you wish not only egg.