In a small bowl, combine the garlic, bouillon, Italian seasoning and salt. Crumble beef over mixture; mix well. Shape into 8 thin patties. Place a slice of cheese between two patties and press edges to seal (repeat the process three times so you end up with four burgers total).
Grill, covered, over medium-hot heat for 6-8 minutes each side or until meat is no longer pink. Serve on buns with pizza sauce.