Nothing is worse than biting into a meal with leeks and feeling sandy grit between your teeth. Leeks have layers, similar to onions, and as they grow up through the ground they gather dirt in-between those layers.
The easiest way to clean leeks is to cut the tough green parts off and discard and cit the white part of the leek into 1/2 inch rounds. Separate the layers and plunge them into a large bowl. Make sure the bowl is large enough so that no leeks are forced to the bottom, they all need to float.
Aggravate the water a little and let the dirt settle to the bottom. When you’re satisfied that all the dirt is settled, skim the leeks off the top and dry on paper towels.
Metabolic Medical Center