Vanilla Chiffon Cake

Name: Vanilla Chiffon Cake
Yield: Makes one 20-cm cake
Cuisine: Asian
Ingredients: Egg whites 5, about 180 g; Vanilla bean 1, split lengthwise and scraped for seeds, or use 1 tsp vanilla extract or paste; Corn flour (cornstarch) 10 g; Canola oil 60 g; Water 60 g; Castor (superfine) sugar 20 g; Egg yolks 5; Pastry flour or top flour 80 g