01 - Preheat oven to 350°F. Line a 9x13-inch baking sheet with parchment paper and lightly grease with cooking spray or butter.
02 - In a medium bowl, whisk together flour, sugar, salt, and baking powder until evenly blended.
03 - In a separate bowl, beat eggs, milk, melted butter, and vanilla extract until smooth. Pour wet mixture into dry ingredients and stir until just combined—do not overmix.
04 - Spread batter evenly onto the prepared baking sheet. Bake for 12-15 minutes until 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 - Gently remove cooled cake from pan and place on a clean work surface. Trim edges for a neat, uniform appearance.
07 - Spread whipped cream evenly over cake surface, leaving a 1/2-inch border along one long side. Sprinkle diced strawberries uniformly across the cream.
08 - Starting from the filled long side, carefully roll cake tightly using parchment paper to guide the roll. Wrap and refrigerate for 20 minutes to set.
09 - Remove from refrigerator and slice roll into 8 even pieces using a sharp knife. Wipe knife clean between cuts for neat edges.
10 - Top each piece with a thin strawberry slice and sprinkle with chopped mint if desired. Serve chilled for best texture and flavor.