Use a small knife to cut a square out of the top of the toast, but don't cut off the sides!
Cut the sausage and cheese into small pieces
Melt the butter in a pan, put in the toast, break an egg into it, then sprinkle the sausage and cheese pieces, if you want it a little salty you can add in some salt.
Take the cut off toast square and cover it tightly, flip it and fry a little, then sprinkle on some black pepper