Heat the butter or margarine in a non-stick pan and leave the bacon in it. Put the flour in the pan and stir. Deglaze with water until you get a creamy sauce - roux. Add the salt, sugar and juice of about half a to 3/4 lemon to the sauce - depending on how sour or sweet you like it.
Add the raw eggs to the sauce and let them set until the egg white is firm. The egg yolk can still be a little runny. We also have boiled potatoes or puree.