Cook chicken in a skillet till done. (You can also use pre-cooked chicken.)
Remove chicken from pan and chop.
Cook onion and peppers in skillet until tender.
Return chicken to pan.
Add beans, corn and spices.
Fill taco shells and set upright in oven-proof pan.
Sprinkle with cheese.
Bake 350 for 5-10 minutes or until heated through.