01 - Preheat your oven to 350°F. Line a 9 x 13 inch baking sheet with parchment paper to prevent sticking.
02 - In a mixing bowl, beat the eggs and granulated sugar together until the mixture becomes thick and pale, approximately 5 minutes. Add vanilla extract and salt. Gently fold in the flour until just combined, being careful not to deflate the batter.
03 - Spread the batter evenly over your prepared baking sheet. Bake for 12 to 15 minutes, or until the cake is lightly golden and springs back when touched.
04 - Turn the baked sponge onto a clean kitchen towel that has been dusted with powdered sugar. Carefully peel away the parchment paper. Starting from the short end, roll the sponge together with the towel. Allow to cool completely while rolled.
05 - While the cake cools, whip the heavy cream, powdered sugar, and vanilla extract together until stiff peaks form. Gently fold the diced strawberries into the whipped cream.
06 - Carefully unroll the cooled sponge. Spread the strawberry cream filling evenly over the surface, leaving a 1/2 inch border around the edges.
07 - Re-roll the sponge tightly around the filling. Slice off both ends for a neat appearance. Cut the roll into 3/4 inch pieces to create sushi-style bites.
08 - If desired, roll the exposed edges in desiccated coconut to mimic rice. Garnish with thin strawberry slices or fresh mint leaves before serving.