Preheat your oven to 375°F (190°C) and prepare a half sheet pan.
Whisk egg whites until foamy, adding ½ cup sugar gradually; beat to medium peaks.
Whisk egg yolks with remaining sugar and vanilla until thick and pale.
Fold egg whites into yolk mixture, sift flour over it, and fold until no flour streaks remain.
Pour batter into prepared pan and bake for 10-12 minutes until golden.
Invert cake onto powdered sugar dusted linen and roll tightly to cool.
Unroll cake, spread raspberry preserves evenly.
Beat heavy cream with powdered sugar and vanilla; fold in 6 ounces raspberries.
Spread cream over preserves, sprinkle halved raspberries, and re-roll tightly.
Chill in the refrigerator for 1-2 hours, then prepare outer frosting.
Whip cream with powdered sugar and vanilla, cover outside of the roll cake, and top with raspberries.
Dust lightly with powdered sugar, slice, and enjoy!