01 - Preheat oven to 350°F. Line a 9x13-inch baking sheet with parchment paper and lightly grease.
02 - In a bowl, whisk together flour, sugar, salt, and baking powder until well combined.
03 - In a separate bowl, beat eggs, milk, melted butter, and vanilla extract until smooth.
04 - Pour wet ingredients into dry ingredients and mix until just combined. Do not overmix.
05 - Spread the batter evenly onto the prepared baking sheet. Bake for 12-15 minutes, or until the cake springs back when touched. Let cool completely.
06 - Meanwhile, whip the heavy cream with powdered sugar and vanilla extract until stiff peaks form.
07 - Gently remove the cooled cake from the pan and place on a clean surface. Trim edges for neatness.
08 - Spread an even layer of whipped cream over the cake, leaving a 1/2-inch border along one long side. Sprinkle the diced strawberries evenly over the cream.
09 - Starting from the opposite long side, carefully roll the cake up tightly, using the parchment paper to help guide the roll. Chill in the refrigerator for 20 minutes to set.
10 - Slice the rolled cake into 8 even pieces to resemble sushi rolls. Top each sushi piece with a strawberry slice and a sprinkle of chopped mint, if desired. Serve chilled.