Chop bell peppers, chop onions, and mince the garlic
Heat olive oil in large skillet (cast iron, etc), add the ground turkey, break into small chunks, and season well with salt and pepper. Stir occasionally
Cook turkey about 4 to 5 minutes or until it is lightly browned on the outside (almost no pink remaining)
Transfer ground turkey to slow cooker, set on low
Add beans (drained and rinsed), corn (drained), onions, diced tomatoes, bell peppers, garlic, and broth to slow cooker
Add chili powder, cumin, oregano, salt, pepper, and cayenne (optional) and stir
Slow cook on low for 6 hours (or optional: 4 hours on high)
Taste test 30 min to an hour before serving and adjust seasonings if desired