Cool mixture and store in a covered container in the refrigerator up to 1 week. To serve sauce that has been chilled, reheat in a saucepan over low heat until warm. Or, microwave 1 cup of the mixture in a glass measure on 100 percent power (high) for 1 to 1-1/2 minutes or until warm, stirring once. Stir in nuts just before serving. Makes about 3-1/2 cups (twenty 1/4-cup servings).