Ingredients:
2 tablespoons butter
1 red onions, sliced
2 cups chopped mushrooms
1/2 teaspoon dried thyme
1/4 teaspoon salt
1 1/2 lbs beef
1/2 teaspoon salt
1/2 teaspoon pepper
4 slices sharp cheddar cheese
4 crusty rolls
4 leaves lettuce
1 tomatoes, sliced
Directions:
filling: melt butter in skillet add onion cook 4min add mushrooms, thyme, and salt cook until liquid evaporates cool Burgers: divide meat into 8 portions shape into 3 1/2″ patties spoon quarter filling in center and spreand leaving 1/2″ border top with another patty and pinch together.
Flatten.
cover and chill in freezer 15minutes season sides with salt and pepper grill 6-8 minutes per side top with cheese during last 4 minutes grill rolls.
2min serve burgers on rolls with lettuce and tomato.
Servings: 4
Time preparation: 30 min.
Time total: 40 min.