Product Recall: Kraft and Polly-O String Cheese and String Cheese Twists. Click here
MICROWAVE onions and water in large microwaveable bowl on HIGH 2 min.; drain. Add 2 Tbsp. dressing; mix lightly.
STIR in chicken, cilantro and remaining dressing. Add lettuce, avocados, radishes and half the cheese; mix lightly.
SPOON onto tostada shells; top with remaining cheese. Serve with lime wedges.