Heat broth to boiling and add chicken (or turkey), garbanzos, chipotle pepper, rice and oregano. Serve in large individual bowls, and add cheese pieces prior to serving. CHEF'S NOTE: The proper name of this soup is Caldo Tlalpeno. The chipotle pepper called for is a special smoked chile pepper, properly called the chile chipotle adobado, available from specialty shelves in the grocery store in cans.