Turn the dough out onto a lightly floured work surface and press or roll into a 16 x 11-inch rectangle. Spread about 1 1/4 cups (about 300 gm) ube jam filling mixture evenly across the top of dough going right to the edges. On the longest side, cut the dough vertically into six strips. Stack 3 of the strips on top of one another, making 2 layers of 3 strips each. Then, using a sharp knife, carefully cut the stacks into 4 squares.