Taiwanese Castella

Meringue; 6 egg whites + 1/2 cup sugar

------------------------ 6 egg yolks 1/2 cup cooking oil (120ml, 120g) 1/2 cup milk (120ml, 120g) 1 teaspoon vanilla extract 1 cup plain flour (240ml, 145g) 150 degrees (300F) 60 minutes