Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1      small         onion -- sliced
   2                    limes -- juice of
     1/2  teaspoon      oregano
     1/2  teaspoon      chili powder
     1/2  teaspoon      ground cumin
     1/2  teaspoon      coarse pepper
   2      cloves        garlic -- minced
   1      pound         boneless chicken breasts -- cut into strips
     1/2                red bell pepper -- cut into strips
     1/2                green pepper -- cut into strips
   4                    flour tortillas (8 inch) warm -- (up to 6)
   1                    tomato -- chopped
                        sour cream

Preparation:

Place onion in crock. Combine lime juice and seasonings in small bowl. Add chicken and toss to coat. pour chicken and juice mix over onion. cover and cook 6-8 hours. Stirin green and red pepper strips 30 minutes before serving. To serve: spoon chicken and onion into center of tortillas. Top with tom oato and sour cream.