Scrum-Delicious Burgers Recipe | Say Mmm

Ingredients

• 1-1/2 pounds ground beef
• 3 tablespoons finely chopped onion
• 1/2 teaspoon garlic salt
• 1/2 teaspoon pepper
• 1 cup shredded cheddar cheese
• 1/3 cup canned sliced mushrooms
• 6 bacon strips, cooked and crumbled
• 1/4 cup mayonnaise
• 6 hamburger buns, split
• Lettuce leaves and tomato slices, optional