Sweet And Sour Beef Fajitas
["1 lb. boneless sirloin", "1 Tbsp. vegetable oil", "1/2 cup salsa", "1/4 cup ketchup", "1-2 Tbsp. brown sugar", "1/2 Tbsp. Dijon mustard", "4 flour tortillas"]
["Cut beef into thin strips. Heat oil in skillet over high heat. Add beef. Stir fry 2-3 minutes, until brown. Drain. Stir in salsa, ketchup, brown sugar and mustard. Cook 1-2 minutes, stirring constantly until hot. Spoon into tortillas. Top with lettuce, tomatoes, and sour cream."]
["boneless sirloin", "vegetable oil", "salsa", "ketchup", "brown sugar", "mustard", "flour tortillas"]