Bake rolls following directions on package.
In a small bowl, combine peppers, bacon and cream cheese. Mix well.
In a large bowl, combine garlic, salt and pepper. Crumble beef over garlic mixture and mix well. Shape into twelve 3 to 4-inch patties. Spoon pepper mixture onto center of six patties. Top with remaining patties and press edges firmly to seal.
Grill burgers and top with cheese. Split rolls and fill with burgers, tomato, lettuce and guacamole.