1. Preheat oven to 350°. Stir together first 5 ingredients in a large bowl until smooth. Stir in chicken and next 5 ingredients until blended. Spoon cheese mixture into a lightly greased 8-inch square baking dish.
2. Bake at 350° for 30 minutes or until bubbly. Spoon into a serving bowl. Garnish, if desired. Serve with tortilla and sweet potato chips.