Can be prepared in 45 minutes or less.

Ingredients

　　two 10-ounce packages frozen peas

　　2 bunches of watercress, coarse stems discarded and the watercress rinsed  and spun dry (about 4 cups)

　　1/4 cup water

　　2 tablespoons unsalted butter

　　In a large saucepan combine the peas, the watercress, and the water and boil the mixture, covered, for 5 minutes, or until the peas and watercress are tender. Transfer the mixture to a food processor, add the butter and salt and pepper to taste, and purée the mixture.