Line the base of a 20cm cake tin with silicon or greaseproof paper and wipe sides with a little olive oil, then dust with a little plain flour.
Oven 180 ºc
Beat the oil and sugar together with an electric mixer, add the eggs one at a time and beat until the mixture looks like mayonnaise.
Sieve flour, cinnamon, bicarb, cream of tartar and a pinch of salt into a clean bowl.
Gradually add this dry mix to the oil and sugar, folding in with a metal spoon.
Then mix in apple and lemon juice and zest.
Drain the sultanas and add.
Pour the cake mixture into the tin.
Bake for approx. 1 hour 25 mins until an inserted skewer comes out clean.
Leave cake in tin to cool
Serve as is or with a lovely dollop of greek yoghurt or crème fraiche