Set the mixture aside.
Grab a separate mixing bowl, then sift the flour, baking powder, and cornstarch together.
Mix them until well combined, and set them aside as well.
Image Credit: How Tasty via YouTube
Add about a quarter portion of the egg whites and mix it in with the yolk until well combined.
Gently fold the egg yolk mixture and egg whites mixture together until well combined.
Pour the batter into a lined and greased 8*8 inches cake pan, then spread it evenly.
Bake it in a preheated oven at 320F for 20 minutes until cooked through.
Let cool down slightly in the pan, then unmold it on a wire rack.
Once cooled completely, cut the cake into 2 layers.
Proceed to whip the whipping cream and vanilla together until medium peaks form.
Place gelatine mix and powdered sugar into whipping cream and whip until firm and medium-stiff peaks form.
The place where you put strawberries is where you will cut the cake.
Cover strawberries with the whipped cream mixture including the gaps.
*All these images are credited toHow Tastyvia YouTube.