Sprinkle sugar evenly on one side of a slice of bread.
Beat eggs and mix in finely chopped carrots and cabbage.
Heat butter or cooking oil in a pan and cook the egg mixture in a wide layer.
When the eggs are almost cooked, place a slice of bread on top and flip it together with the eggs.
Lightly toast the sugar-coated side of the bread on the pan.
Add cheese and ketchup to taste, fold the bread over, and finish.