- 1 teaspoon olive oil
- 4 slices bacon, finely chopped
- 1/2 cup finely chopped shallots
- 2 cups finely chopped button mushrooms
- 1 teaspoon salt
- 1 teaspoon ground black pepper
- 1 teaspoon Worcestershire sauce
- 1 egg, lightly beaten
- 1 pound ground beef (10% fat)
- 4 ounces Gorgonzola (or blue cheese), divided into 16 portions
- 32 California walnut halves
- 16 small dinner rolls
- Heat oil in a heavy saucepan over medium heat and saute bacon until just cooked but not crisp.
- Add shallots and cook until translucent. Add mushrooms and continue cooking until water evaporates, about 5 minutes.
- Transfer mixture to a large mixing bowl and let cool. Add salt, pepper, Worcestershire sauce and egg to mixture. Add beef and gently mix by hand until all ingredients are incorporated, without over-mixing.
- Divide mixture into 16 equal portions. Form into thick patties, about 1-1/2 inches thick and 2-1/2 inches in diameter, tucking a piece of cheese and 2 walnut halves into the centre of each patty.
- Grill patties on medium-high heat until cooked to preferred doneness. Serve in small dinner rolls or between baguette slices with desired condiments.