1

To prepare the burgers: In a medium bowl, cover mushrooms with boiling water and allow them to soak until soft, about 45 minutes. Drain the mushrooms and squeeze out the excess water. Blot the mushrooms with paper towels, cut out the tough stems and discard. In a food processor, process the mushrooms until finely chopped and place them in a medium bowl. Add the remaining burger ingredients and gently mix with your hands. Shape into 4 patties, each about 3/4 inch thick.

2

Grill the patties over Direct High heat until medium, 8 to 10 minutes, turning once. During the last 30 seconds, top the burgers with the brie and grill the bread until lightly toasted. Serve the burgers hot on the toasted bread with the lettuce and mustard.