SPRINKLE nuts over bottom of well-greased 13 x 9-inch baking pan.
MELT butter in medium, heavy-duty saucepan over medium heat. Stir in sugar. Bring to a boil, stirring constantly. Boil, stirring constantly, for 7 minutes. Pour hot mixture over nuts; let stand for 5 minutes. Sprinkle with morsels. Let stand for 5 minutes or until morsels are shiny and soft; spread evenly.
REFRIGERATE for about 20 minutes. Break into bite-size pieces.