Product Recall: Kraft and Polly-O String Cheese and String Cheese Twists. Click here
HEAT oven to 350ºF.
COMBINE first 6 ingredients in 1-1/2-qt. casserole; cover.
BAKE 20 min. Meanwhile, mix cracker crumbs and butter.
STIR tuna mixture; top with crumbs. Bake, uncovered, 8 to 10 min. or until topping is golden brown.