Preheat oven to 350. Meanwhile, in microwave safe large bowl, place potatoes and 2 T. water. Cover bowl with waxed paper and microwave on high 3 to 4 minutes or until potatoes are fork tender, stirring once. Add chicken and all remaining ingredients to potatoes and toss to mix well. Transfer mixture to 13 x 9 inch glass or ceramic baking dish. Bake casserole, uncovered, 50 to 55 minutes or until chicken loses its pink color throughout and cheese begins to brown.