Leeks are one of my favorite go-to vegetables. They have a beautiful onion-like flavor but much milder. We have to order in our Leeks for most months of the year but they are easy to grow in our polytunnel during the growing season. Our personal onions come into the season mid to late summer and we normally have them in huge quantities. Some varieties like Musselburgh Leeks can be bunched and harvested early when they are about the size of a finger or pencil, or they can be thinned and allowed to grow to a much larger mature size. an affordable staple and always available at a maximum of £2.50 per kilogram.