Steak & Potato Winter Wraps

Place potatoes in microwave-safe dish; cover with plastic wrap, venting one corner. Microwave on HIGH 7 to 9 minutes or until just tender; set aside. Meanwhile, cut steak lengthwise into thirds, then crosswise into 1/4-inch thick slices. In large nonstick skillet, heat 1 tablespoon of the oil over medium-high heat until hot. Add 1/2 of the beef; cook and stir 2 to 3 minutes or until browned. Using slotted spoon, remove to large bowl; repeat with remaining oil and beef. Combine both batches of beef and Worcestershire sauce; toss to combine. Add potatoes to skillet; cook and stir until most of the liquid is absorbed. Add beef, cheese and onions; mix lightly until cheese just melts. Season with salt and pepper, as desired. To serve, spoon ½ cup potato mixture onto center of each tortilla. Fold bottom edge up over filling; fold right and left sides to center, overlapping edges. Serve with steak sauce, if desired.