7 egg whites
3 ml tartar cream (or lemon juice)
250 gm flour (sifted)
5 ml baking powder
3 ml salt
200 gm sugar
125 ml oil
5 egg yolks
100 ml water
100 ml fresh lemon juice
15 ml finely grated orange rind

Method:

• Whisk egg whites and tartar cream together until stiff.
• Sift flour, with baking powder and salt.
• Add sugar, then oil, egg yolks, water, lemon juice and orange rind, one by one.
• Beat the two mixtures together with an electric beater until smooth.
• Pour into a pan and bake at 160C for an hour and 10 minutes.
• Remove from oven and let it cool.