Preheat oven to 200 degreeC

Beat separate eggyolks to eggwhite.

Beat eggwhites until fluffy, Add half of the sugar until soft peak

Add cream of tartar beat until stiff

Set aside. In another bowl beat eggyolks add the remaining sugar grdually.

Add vanilla, beat until pale in color.

Fold the beaten eggyolk to the eggwhite mixture alternate with the flour

Pour into the prepared pan and bake for 40-45 minutes