If you need to prepare leeks for a soup or stew, here’s the best way to do it.
Clean the leeks well by cutting off the hard root end and hard dark green leafy parts. Cut in 3-4″ sections crosswise, and then cut each section in half lengthwise. Rinse well under running water while fanning out the layers to remove any trapped dirt particles. Pat dry with a kitchen towel and then thinly slice crosswise into half moon shapes.