01 - Preheat oven to 350°F. Line a 9x13-inch baking sheet with parchment paper and lightly grease with butter or cooking spray.
02 - Whisk together flour, granulated sugar, salt, and baking powder in a medium mixing bowl until thoroughly blended.
03 - Beat eggs, milk, melted butter, and vanilla extract in a separate bowl until uniform. Pour the wet mixture into the dry ingredients and stir until just combined—do not overmix.
04 - Spread batter evenly across the prepared baking sheet. Bake for 12–15 minutes until the cake springs back when lightly touched. Cool completely on a wire rack.
05 - While cake cools, whip heavy cream with powdered sugar and vanilla extract using an electric mixer or whisk until stiff peaks form.
06 - Carefully remove cooled cake from the pan and place on a clean work surface. Trim the edges with a sharp knife for even rolling.
07 - Spread whipped cream evenly over the cake surface, leaving a 1/2-inch border along one long side. Sprinkle diced strawberries uniformly across the cream layer.
08 - Starting from the long side opposite the border, tightly roll the cake using the parchment paper to guide the shape. Refrigerate for 20 minutes to set the filling.
09 - Remove the roll from the refrigerator and cut into 8 equal pieces with a sharp knife. Wipe the blade clean between cuts for neat slices.
10 - Top each piece with a thin strawberry slice and a light sprinkle of chopped mint, if using. Serve immediately or keep refrigerated until ready to enjoy.