Shape dough into ball. With floured fingers, press dough evenly over bottom and up side of 10-inch tart pan with removable bottom or 9-inch glass pie plate. Flute edge, if desired. Prick bottom and sides of pastry generously with fork. Bake 8 to 12 minutes or until lightly browned. In 1-quart saucepan, melt chocolate chips and half-and-half, stirring until smooth. Spread in shell. Cool slightly; refrigerate until chocolate is firm, about 15 minutes.