Cheese Stuffed Burgers

INGREDIENTS

• Lettuce
• White sandwich bread
• 8 ounces blue cheese, cut into 1-inch cubes
• 4 hamburger buns
• Three 10-ounce bricks sharp Cheddar, finely grated
• 8 ounces Pimiento Cheese Spread, recipe follows
• Two 7-ounce jars canned, sliced pimientos, drained
• 1 cup mayonnaise
• 2 pounds ground beef
• Sliced pickles
• Grilled sweet onions
• 1 teaspoon salt
• Sliced tomatoes
• 1/2 teaspoon pepper
• 8 ounces mozzarella, cut into 1-inch cubes