If you want fresh vegetables in the winter, leeks (Musselburgh) are so easy to grow and for a novice vegetable gardener like me, this is good news. My method of growing is to start seed off in a litre pot and when the seedlings are competing against each other (about 8 inches long), that is when I transplant them to the bed. I use the method my Dad uses, which is to simply make a hole in the soil, place the seedling in, and then just fill the hole up with water. Works every time, and this is the result, picked quite young, but of course you can leave until they become fatter, in fact I always leave a few in the ground to go to seed, as the heads are so ornamental and can give any variety of allium a run for their money.
Click on British Leeks for everything you need to know about leeks, including recipes. I love leek and potato soup, but quite often I just saute some in a little butter, add to mashed potato and top with cheese, delicious.