groung beef High Quality top round trimmed of all fat mustard, egg yolk, ketchup, worchestire, caper, shallot, cornichon, parsley in food processor chop cornichon, caper, parsley and mustard. place egg yolk and meat in a bowl and mix with salt and pepper. Add a touch of mustard, tabasco and a little ketchup. Then mixin the cornichon paste. good luck!