Yam swiss roll

Ingredients

• 4 Large eggs whites
• 35 g castor sugar
• 4 Large egg yolks
• 35 g Castor sugar
• 1/2 teaspoon or 2 g baking powder
• 1 teaspoon vanilla essence
• 10 g cornflour(sifted)
• 70 g cake flour(sifted)
• 1 g salt
• 40 ml Melted butter/canola oil
• 40 g milk
• Some Icing (for decoration)

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Preparation

• Pre heat oven at 350F. Beat egg whites cream and sugar(add gradually)till stiff.
• Add in 30 g sugar and continue beating till thick and glossy. Beat egg yolks,ovallete and 30 gm sugar till light and creamy.
• Lightly fold in sifted flour,corn flour,baking powder,milk and oil into the egg yolk batter.
• Gently fold in egg whites.(Do not overfold). Pour batter in shallow tin lined with waxed paper.
  
• Bake for 15-18 minutes. You need to roll it immediately while it's hot,then let it cool. Unwrap and fill your favourite filling and roll back up.10).
• Leave it cool and then spread the yam filling and roll the cake.
• Sprinkle some icing sugar on top.