This version calls for celery and a splash of white wine.
4 tablespoons butter
4 leeks, white parts only, sliced
2 onions, peeled and sliced
2 stalks celery, sliced
1-1/2 quarts chicken stock
2 potatoes, peeled and chopped
1 cup cream
1/4 cup dry white wine
Salt and pepper to taste
Chopped chives
Melt butter in soup kettle. Saut