Preheat and oil the grill; alternatively, preheat a stovehop grill pan or a heavy-bottomed frying pan over medium-high heat. Combine the chicken with the egg white, using your hands to blend. Add the fresh chile, bell pepper, scallion, ground chiles and cumin.
Again, using your hands, mix well to blend. Season with salt and pepper, to taste, and form the mix into 4 patties of equal size.
Place the burgers on the preheated grill (or stovetop pan) and grill for 5 minutes. Turn and grill for another 4 minutes for well done.
Remove from the grill and serve, topped with about ¼ cup guacamole.
For the Guacamole, combine the avocado, lime juice, tomato, cilantro, scallion and chile in a medium bowl and mix well to blend. Season with salt and pepper, to taste, and serve.