In a blender, combine raspberries, granulated sugar, and pinch of salt and puree until sugar dissolves, about 1 minute. Pour mixture through a fine-mesh sieve into a medium bowl, pressing on solids (discard seeds).
In a large bowl, using an electric mixer, beat cream and confectioners' sugar on high until stiff peaks form, about 3 minutes. Beat in lemon juice. In six small glasses, alternate layers of raspberry puree and whipped cream. With a skewer or thin-bladed knife, gently swirl whipped cream and puree together. Smooth tops and serve immediately.