If using crescent dough sheet, unroll dough on cutting board; press into 14x8-inch rectangle. If using crescent rolls, unroll dough on cutting board, press into 14x8-inch rectangle, firmly pressing perforations to seal. Cut into 2 rectangles, 14x4-inches each. Spread half of the potato mixture on one rectangle to within 1/4-inch of long edges. Starting at one long side, tightly roll up dough; pinch seams to seal. Using serrated knife, cut roll into 14 slices. Place slices, cut side up, on cookie sheets. Repeat with remaining dough and filling.