For a while Farm Fresh to You was delivering a load of leeks with every delivery. I'd mostly added them to my broths because it really punches up the flavor of them. They also work well in a few different soups, light and heavy.
The most basic is the potato-leek soup:
1 tbs butter
1 stalk of leek
2 minces cloves of garlic
4 small potatoes diced
1 sprig thyme
6 cups vegetable broth
Chopped chive to garnish
Season to taste with salt/pepper
Warm pot to melt butter and saute leek and garlic.
Add potato and thyme and season.
Allow leek to wilt and add broth.
Stick blend (or blend normally), ladle to bowl, and doll up with chive.