Dragon steaks

500g ground beef
salt pepper
tablespoons chopped onion
2 tablespoons dragon vinegar
2 tablespoons butter
4 halve rolls
4 slices cheese if desired
1 tablespoon chopped parsley
Mix meat with parsley, salt and pepper and make 4 flat burgers. Sprinkle chopped onion and vinegar over it.

STEP2
After 15 minutes fry them in hot butter brown, quickly.
Put slices of cheese on it.