a slice of bread
Put the bread on a cutting board, and press a glass cup into the center to make a hole. Butter one side of the bread.
Heat frying pan over a low flame.
Place the bread, buttered side down, on the heated pan. Put a little bit of butter into the hole so the egg won't stick. When it's melted, carefully break the egg into the hole.
Place the circle of bread, butter side down, beside the bread in the pan to toast it.
While it's cooking, carefully butter the top of the bread.
When the egg is cooked enough to turn it, slide your spatula under the egg and turn over the bread and egg as one. (Flip the little circle, too.) Cook the egg to your desired doneness.