Heat large an or skillet to medium heat; add oil and heat for a few seconds. Add chicken-free strips. Cook for 2-3 minutes on each side or until strips are golden in color.
Lay tortillas flat on plate. Add a layer of shredded lettuce. Top with chicken, onions and sour-cream. Sprinkle chopped green onions or/and cilantro. Squeeze 1/4 of the lime on each taco.