Prepare cake base: Lay sponge cake flat on a parchment-lined surface. If needed, gently roll with a rolling pin to flatten slightly.
Spread cream: Evenly spread whipped cream over the cake.
Add strawberries: Arrange strawberry slices in a single layer on top of the cream.
Roll it up: Starting from the long side, gently roll the cake into a log, using the parchment to help.
Chill: Wrap tightly and refrigerate for 15 minutes to firm up.
Slice “sushi”: Using a sharp knife, slice into 1-inch rounds to resemble sushi rolls.
Serve: Drizzle with strawberry jam or glaze and sprinkle with powdered sugar before serving.