To trim edible-pod peas, such as sugar snap and snow, cut or snap off ends and pull up sharply to remove any string on the pea. Discard ends and strings. To blanch fresh peas (either shelled or whole edible-pod types), bring water to a boil in a large pan, then add peas. Cook just until they start to turn a brighter green, 15 to 30 seconds, then drain immediately. Rinse well under cold running water until cool, then drain again.