To prepare a spargel in weisser sosse white asparagus in w vegetables recipe, you first need to prepare the asparagus. Cut the spears in half lengthwise, and then cut them into 12 inch (1.3 cm) thick slices. Chop the white part of each spear into 1/4-inch (.6-centimeter) cubes. Add the cubed asparagus to the bowl of boiling water. Let it sit for 5 minutes, then remove it from the water and set it aside to cool.