Heat olive oil in saute pan over medium heat. Add onions and saute for 2 minutes, peppers and saute for 3 more minutes. Add black beans, chipotle and cumin, cook for an additional 2-3 minutes. Place aside to cool. Combine chicken and vegetable mixture to form into a patty, season both sides with pepper.
Shape into 5 patties. Can be individually frozen at this point, let thaw for 1 day in refrigerator before sauteing.
Saute patties in small amount of olive oil about 4 minutes / side or until done. Place burger on bun and top with avocado slices and lettuce.
**Chipotle pepper in adobo sauce- comes in a small can in the International foods aisle of the grocery. Fish out needed peppers with a little sauce, chop and add to recipe. Freeze the rest of the can contents in a freezer ziplock bag. Whenever you need some, you can just break off a chunk and add it to your recipe (like chili, tacos, etc).