Instructions

1. 1
   Heat a thin layer of vegetable oil in a frying pan. Add the mushrooms and cook for 5 minutes, stirring regularly, until soft.
2. 2
   Add the garlic and parsley, and let the mushroom mixture cool.
3. 3
   Combine the ground beef and cooked mushroom mixture. Shape into patties, and let rest for at least 2 hours.
4. 4
   Combine the cream and chilli sauce, and set aside.
5. 5
   Heat a griddle pan. Season the patties with salt on both sides, then place on the griddle.
6. 6
   Cook the patties until browned on each side and fully cooked through.
7. 7
   Remove patties from the heat and let rest for a few minutes.
8. 8
   Toast both sides of the hamburger buns.
9. 9
   Lay some lettuce and sliced tomato on one half on a bun. Top with a patty, then some burger sauce. Top with the second half of the bun.