Raspberry-Blueberry Sauce
["2 c. fresh or unsweetened frozen raspberries", "1/3 c. raspberry preserves or jam", "1/3 c. water", "2 Tbsp. granulated sugar", "1 c. fresh or frozen blueberries (small berries look better)"]
["Mix 1 cup of the raspberries, the preserves, water and sugar in a medium sized heavy saucepan (not uncoated aluminum).", "Bring to a boil over medium-high heat.", "Strain mixture through fine strainer suspended over bowl.", "Press down on raspberries to release juice.", "Discard seeds.", "Stir blueberries and remaining 1 cup of raspberries into hot raspberry syrup.", "Cover and let stand until cool.", "Refrigerate until ready to use."]
["raspberries", "raspberry preserves", "water", "sugar", "blueberries"]