01 - Preheat oven to 350°F. Line a 9 x 13 inch baking sheet with parchment paper.
02 - Beat eggs and granulated sugar in a bowl until thick and pale, about 5 minutes. Add vanilla extract and salt. Gently fold in the flour until just combined.
03 - Spread the batter evenly over the lined baking sheet. Bake for 12 to 15 minutes, or until lightly golden and springy to the touch.
04 - Turn the sponge onto a clean kitchen towel dusted with powdered sugar. Peel away parchment paper. Roll sponge with the towel from the short end. Let cool completely.
05 - While cake cools, whip the heavy cream, powdered sugar, and vanilla extract to stiff peaks. Gently fold in diced strawberries.
06 - Unroll cooled sponge. Spread strawberry cream evenly over the surface, leaving a 1/2 inch border around edges.
07 - Re-roll sponge tightly. Slice off ends for neatness. Cut into 3/4 inch sushi-sized pieces.
08 - Roll edges in desiccated coconut if desired. Garnish with thin strawberry slices or fresh mint leaves.