Ingredients

• 350
  g
  beef fillet - minced to preferred consistency
• 350
  g
  beef sirloin - minced to preferred consistency
• 2
  egg yolks (not the whites)
• 1
  handful
  fresh chopped parsley
• 2
  lemons - zest only
• 2
  tsp
  worcestershire sauce

• 2
  tsp
  Dijon mustard
• sea salt - to taste
• Freshly ground black pepper to taste
• 1
  Tbs
  clarified butter
• Olive oil as needed for frying
• Optional: for those of you that like adding onions to a burger, add 1 tbsp very finely chopped red o