Cut the avocado in half and remove the seed. Now cut a thick slice from each half and remove the skin.
Lay the avocado slices on the bread slices and cut the bread around the avocado so it fits into the hole.
Fry the bread slices in a pan for about two minutes.
When one side is done, turn the bread over and place the avocado slice in the hole. Now add the egg to the avocado along with some salt and pepper. Sprinkle some cheese on the bread, cover the pan and let it fry for about 7 minutes.
When they're done, remove them from the pan, add some chopped spring onion and serve.