Kue Custard Tiga Lapis Ajaib (Dari Satu Adonan)

Bahan-bahan (9 porsi)

• 4 eggs (, yolks and whites separated (at room temperature))
• 3/4 cup (150g) sugar ( (ordinary or caster sugar))
• 1 tsp vanilla extract
• 1 stick (4oz / 125g / 1/2 cup) unsalted butter (, melted )
• 3/4 cup (4oz / 115g) plain all purpose flour
• 2 cups (500 ml / 1 pint) milk ((lukewarm) (full fat or low fat but not zero fat) )
• Icing sugar ((powdered sugar), for dusting)
• Fresh strawberries
• Whipped cream