Mushroom and Swiss Burger with Whole Wheat Buns

Method

1. In a skillet, heat olive oil over medium heat. Add mushrooms and onions, sauté until softened and browned.
2. Add Worcestershire sauce and cook for another 2 minutes.
3. Divide ground beef into 8 portions and shape into patties.
4. Heat a grill or skillet over medium-high heat. Cook patties for 4-5 minutes per side until browned and cooked to desired doneness.
5. While patties cook, prepare the buns by toasting them in a toaster or on the grill.
6. Assemble burgers by placing a patty on each bun, adding the mushroom mixture, Swiss cheese, lettuce, tomato, ketchup, and mustard.
7. Serve immediately with fries or a side salad.
8. Check that the ground meat reaches 71°C (160°F) throughout before serving.