Product Recall: Kraft and Polly-O String Cheese and String Cheese Twists. Click here
COOK and stir onions in hot oil in small nonstick skillet on medium heat 1 to 2 min. or until onions are crisp-tender.
STIR in all remaining ingredients except buns; cook 5 min. or until crumbles are cooked through (160ºF), stirring occasionally.
FILL buns with crumbles mixture.