• Mix the minced beef with the onion, mustard, chopped parsley, pepper and salt and make 4 equal burgers.
• Cook the patties, flipping them once, until they’re browned and cooked through, about 4 minutes on each side. (Depends on the thickness of the patty).
• Wash the lettuce, cut the tomatoes and grill the buns.
• Slice the mushrooms** and fry them shortly, adding salt and pepper.
• Spread some sriracha mayonnaise on both buns. Then, add some lettuce and tomato on the bottom bun and place the burger and mushrooms on top of it.

*Sriracha is a type of hot sauce or chili sauce made from a paste of chili peppers, distilled vinegar, garlic, sugar and salt. It is named after the coastal city of Si Racha, in Chonburi Province of eastern Thailand, where it may have been first produced for dishes served at local seafood restaurants.

**To make it a little bit easier, you could also use our Ecopouch mushrooms for your burger.