Make these with any kind of berry, but be sure to mold the cones when they are still warm. Otherwise, they become brittle and break.
Preheat oven to 350 degrees F. Combine eggs and sugar; beat until thick and lemon-colored. Add water and flour; continue beating until smooth. Grease and flour a baking sheet. Roll dough to ⅛-inch thickness; cut into rounds 4 inches in diameter. Place on baking sheet and bake about 12 minutes, until edges are lightly browned. Remove rounds one at a time, leaving others in oven. Form into cones gently with hands, working quickly so rounds stay pliable. Place cones in airtight container; freeze until ready to serve.
Combine egg whites and salt; beat until stiff. Gradually add ¼ cup sugar; beat until stiff and glossy. Crush raspberries; stir in 2 tablespoons sugar, lemon juice, and vanilla. Whip cream until stiff; fold into meringue, then fold in berry mixture. Freeze until firm. Before serving, let soften at room temperature. To serve, spoon mousse into cones and top with a fresh berry or two.