Preparation:
In food processor or blender, puree raspberries. Push pureed raspberries through strainer; discard seeds. Return puree to food processor; add orange juice and sugar. Place ginger in a small piece of cheesecloth and squeeze out ginger juice over raspberry mixture. Pulse to combine.
Place strawberries and blueberries in a large bowl and cover with raspberry mixture. Refrigerate covered for several hours.
Cut cake into 16 equal pieces; place each on a plate. Top each piece with 3/4 cup berry mixture and garnish with mint. |