Slice chicken into thin strips and put into a bowl with about a tablespoon of oil
Add cumin, garlic & chili powder, salt & pepper and lime juice - mix well and refrigerate about an hour
Slice peppers and onion into thin strips, set aside
When ready to cook, heat a large pan over medium high heat, add a tablespoon of oil and put in peppers and onions
Stir well a couple minutes, push to one side, add a little more oil then add the chicken
Stir quickly to separate pieces and start getting color - once it does combine it with the veggies and cook until both are done
Serve on warm tortillas with sour cream, some cheese sauce, and a little cilantro