Boil the meat with salt and pepper. Now mix and mashed potatoes and egg in it.
Make patties and fry them from both sides until well done.
Cut the bun into half and spread mayonnaise.
Place patties, onion rings, a cucumber slice and salad leaf
on the bun.
Add cheese slice if you like it. then cover it with the other half. Serve with ketchup and french fries.