Gruyère Bacon Burger - Love of Food

Ingredients

• 8 slices raw bacon
• ½ teaspoon canola oil
• ½ cup thinly sliced red onions
• 1 ½ cups thinly sliced portobello mushrooms
• 1 ½ teaspoons Worcestershire sauce
• 1 teaspoon Montreal steak seasoning
• 1/8 teaspoon Lawry's seasoned salt
• ¼ teaspoon granulated garlic
• ¼ teaspoon granulated onion
• 1 1/8 pounds (18 ounces) raw ground beef (80/20)
• 8 to 9 cremini mushrooms
• 4 ounces thinly sliced Gruyere cheese
• ½ cup ketchup
• 4 teaspoons Dijon mustard
• 4 cleaned and trimmed green leaf lettuce leaves
• 4 (4") sesame seed hamburger buns