【How-to】Where to buy pickled onions

ampeloprasum ‘Pearl-Onion Group’), also known as button, baby or silverskin onions in the UK, is a close relative of the leek (A. ampeloprasum var. porrum), and may be distinguished from common onions by having only a single storage leaf, similar to cloves of garlic. In French they are known as oignon grelot.