chop tomatoes and lettuce, place each a small bowl. Warm up refried beans.
Mix package with 1/4 cup warm water in a bowl; stir to disolve. Place 1/4" strips of chicken breast in in a plastic bag with oil. Add marinade to the bag of chicken.
In a large skillet, thoroughly cook marinated chicken. Add onions and bell peppers. Cook an additional 3-5 minutes. Warm tortillas.
Serve tomatoes, lettuce, refried beans, sour cream, cheese, salsa and chicken with tortilla chips and/or flour tortillas.