Place chicken, bell peppers, and onions in slow-cooker then pour in diced tomatoes. Season with cumin, red pepper flakes, salt, and pepper.
Cook on low for 6-8 hours, or until chicken is cooked through.
Remove chicken from slow-cooker and slice into strips. Fill tortillas with cut up chicken and drained vegetables from slow cooker.
Vampire Teeth Whoopie Pies (as seen on TV 27)
Purchase Karns Whoopie Pies in your favorite flavor. Gently open one side and insert 6 mini marshmallows (the teeth). Add 2 blanched, slivered almonds between two furthest marshmallows on each side (the fangs). Run a line of red icing along the top and bottom of the marshmallows (the gums). Enjoy!