Start by washing the leeks thoroughly. Leeks tend to have a lot of dirt and soil in all the crevices, so follow my instructions above to clean them properly. Then, lay the leek on a cutting board and grab a sharp knife. Cut off the root end. Next, find the spot where the dark green leaves meet the stem, and cut them off as well. You’ll be left with the white and light green stem, which you can then slice into rounds or half-moons as required. For this recipe, I went with ¼-inch rounds.