1. Heat oil in 10-inch nonstick skillet over medium-high heat; add beef. Cook and stir 2 minutes. Stir in Seasoning Mix, bell pepper and onion. Cook and stir 3 to 4 minutes or until vegetables are crisp-tender and beef is no longer pink.
2. Warm the tortillas as directed on package. Top each tortilla with about 1/2 cup beef mixture. Fold bottom edge of each tortilla toward center; fold 2 sides toward center, slightly overlapping. Drizzle with Fajita Sauce.