3-1/3 cups fresh or frozen (thawed and undrained) raspberries or blackberries
1-1/2 tablespoons orange juice
1/2 teaspoon lemon juice
Sugar substitute equal to 3 tablespoons sugar
1/2 raspberries or blackberriesmelon
1/2 honeydew melon
Place 2 cups of the berries and all of the orange juice and lemon juice in a blender or food processor and process until smooth. Pour the mixture into a wire strainer and use the back of a spoon to push the mixture through the strainer and into a bowl. Discard the seeds. Stir the sugar substitute into the berry puree and set the sauce aside.
Remove the seeds and rind from the melons. Cut each melon piece into 3 long wedges and then cut each wedge in half crosswise to make a total of 12 shorter wedges. Using a sharp knife, slice each melon wedge lengthwise toward the point without cutting completely to the end and open each wedge into fan shape.
Place 2 tablespoons of the sauce on each of 6 dessert plates. Top the sauce on each plate with a cantaloupe and honeydew fan and garnish with some of the remaining fresh berries. Serve immediately.