Slice it thinly and grate a carrot or two. Cook them gently in a little butter. Serve with some grilled salmon and buttery mashed potato. A delicious combination!

I was going to say, a leek that fine, deserves to be tempura. But islay's idea sounds even better.

Mmm. Love leeks. If you've an indoor grill (or the weather to venture out to the bbq) get some nice grill marks on it and slice...then add it to a grilled cheese sandwich.

A small pot of potato leek or white bean & leek soup?

Slice, lightly saute in butter with a bit of salt & pepper, and fill an omelet with it and your favorite creamy, mild cheese.

I was going to suggest something along the lines of islay_corbel. Another option is to saute it (thinkly sliced) and top a crusty piece of bread with a little fontina and the sauteed leek - then run it under the broiler.

It definitely deserves to be the star!

Alexa

I'd cut it vertically and add it to some grilled veggies.

Do a French onion soup.

Use leeks instead of onions.

dcarch

A leek, canadian bacon, and cheese quiche.

Here is one of my all time soup recipes. One leek may not give you a full cup but that won't matter all that much.

Potato Leek And Stilton Soup

1 Tbsp butter
1 shallot chopped finely
1 cup leeks thinly sliced ( don't use to much of the dark green portion)
1 cup potato diced
2 cups chicken stock
1 to 1 1/2 cups cream
salt and pepper to taste
pinch nutmeg
few drops lemon juice
2 oz stilton or other blue cheese

Melt butter, add shallot and leek cooking until soft but not browned.

Heat the chicken stock and add to the leeks, add the potatoes. Cook until potatoes are just tender. Cool and puree in the food processor. Separately heat and reduce the cream. Stir in the blended leek mixture.
Bring to a gentle boil. Add seasonings and lemon juice.

Pour into bowls and top each with 1/2 ounce crumbled Stilton. ( I add the cheese to the actual soup with the lemon juice and seasonings)