Rinse berries and place on shallow baking sheet lined with doubled paper toweling. Gently pat and roll berries until dry. Remove paper towel and place sheet (uncovered) in the freezer. Once frozen, pour berries into a heavy-duty plastic bag. Place into another bag for added protection against the formation of ice crystals. To retain best texture, use berries straight from the freezer without thawing. (Adjust baking time, accordingly.)