Fines Herbes Butter

Chop together 1 cup packed fresh flat-leaf parsley leaves, 1/4 cup each packed stemmed spinach and watercress leaves, and 2 tablespoons coarsely chopped fresh chives. Add a tablespoon of chopped fresh chervil, tarragon, basil, dill, thyme, or sorrel (either a single herb or in any combination) and chop again to blend the flavors. Put in a bowl and mix in 1 teaspoon salt and 1 teaspoon anchovy paste. Add 1 cup (2 sticks) softened unsalted butter until the herbs have been thoroughly blended and the butter is completely green. [Editor: Melt a tablespoon of this butter on top of grilled lamb chops or fish, or stir into plain cooked vegetables.]