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Ingredients

• 1 1/2 cups sliced onions (about 3 medium)
• 8 ounces button or cremini mushrooms, sliced (3 cups)
• 1 tablespoon olive oil
• 2 tablespoons snipped fresh parsley
• 2 1/2 pounds 85-percent lean ground beef
• 1/3 cup Worcestershire sauce
• 4 cloves garlic, minced
• 1 1/2 teaspoons salt
• 1 teaspoon ground black pepper
• 16 slices applewood smoked bacon (about 1 lb.) (optional)
• 8 slices Swiss, provolone, and/or Colby and Monterey Jack cheese (optional)
• 8 Kaiser rolls or hamburger buns, split and toasted*
• Tomato slices (optional)

Description

Mushrooms And Caramelized Onions Are Tucked Into The Center Of Ground Beef Patties Before Grilling.

Better Homes And Garden