Lightly mix the ground beef with onion, salt, basil, garlic powder, oregano, and pepper, just until blended.. Shape mixture into 6 patties. Place on broiler pan then broil on both sides until done as desired. Top each patty with a slice of cheese; return to broiler just until cheese begins to melt. Serve in the buttered buns.
Cheeseburger recipe makes 6.