Mix steak sauce and chipotle peppers in medium bowl until blended. Cut steak across the grain into thin slices, then cut each slice crosswise in half. Add to steak sauce mixture; toss to coat. Refrigerate 30 min. to marinate.
Meanwhile, heat oil in large skillet on medium heat. Add onions; cook and stir 5 min. Stir in bell peppers; cook 10 min., stirring frequently. Transfer to bowl.
Remove meat from marinade; discard marinade. Add meat to skillet, in batches; cook on high heat 1 min., stirring after 30 sec. Return all meat to skillet. Stir in vegetable mixture and 1 Tbsp. cilantro. Top with cheese; cover. Cook on medium-low heat 5 min. or until cheese is melted.
Sprinkle with remaining cilantro. Serve with tortillas.
Substitute chopped serrano peppers for the chipotle peppers.
How to Slice Steak for Most Tenderness
Place the unsliced meat on a cutting board and look for the direction of the grain. (The meat will have small lines running in one direction.) You may need to slice the meat in 2 different directions to determine the direction of the grain. Use a sharp slicing knife to cut the meat across the fibers into thin slices. If you have an electric knife, you can use that to quickly slice the meat.
Calories From Fat
% Daily Value*
Total Fat 11g
Saturated Fat 5g
Trans Fat 0g
Total Carbohydrates 19g
Dietary Fibers 1g
* Percent Daily Values are based on a 2,000 calorie diet.
* Nutrition information is estimated based on the ingredients and cooking instructions as described in each recipe and is intended to be used for informational purposes only. Please note that nutrition details may vary based on methods of preparation, origin and freshness of ingredients used.