Preheat oven to 350 F.
Separate egg white and yolk, set yolks aside while you whip the egg whites until they are soft peaks, then slowly add in sugar and vanilla then whip until you have stiff and shiny peaks.
In another bowl, combine flour, salt and baking powder then mix well.
In a small bowl, stir together the milk and egg yolks then add to the flour mixture and mix.
Add the whipped egg white and sugar mixture then gently stir together until the egg white mixture is fully incorporated into the batter.
Pour batter into a greased 9x13 baking pan and bake for ~35 minutes or until the center of the cake is risen and cake is baked through.
When cake is done baking, let it cool slightly while you mix together the three milks.
Mix the milks then poke the cake with a fork or skewer then pour the milk mixture over the top.
Refrigerate until the cake is fully chilled.
Top with whipped cream and fresh strawberries, enjoy.