Pork Tenderloin Fajitas

In a small bowl, combine cilantro, garlic powder, chili powder and cumin; set aside. In a large skillet, saute pork in oil until no longer pink. Add onion and green pepper; cook until crisp-tender. , Sprinkle with seasoning mixture; toss to coat. Spoon onto tortillas; serve with cheese and sour cream if desired.