Toast the bread. On the first slice, spread some mayonnaise. Put the tomato slices and the lettuce on it.
Put a second slice of bread, then the cheese and the ham.
Fry the egg and put it on the ham.
Using a cookie cutter, make a hole on the third bread slice.
Put it on top of the sandwich, to leave the yolk in the hole.
There you are, your club sandwich is ready!