Sift flour, baking powder and salt, set aside. Cream butter and sugar till light and creamy. Add in eggs, stir in orange rind and vanilla. The mixture is a bit watery.
Add flour in 2 or 3 batches, mixing well with each addition. Cut up the fruits. Half the strawberries and cut the kiwi into quarters.
Spoon more than half the batter onto the base of a lighty greased and floured 8 inch round springform pan. Spread evenly.
Scatter the cut fruits over the batter and spoon the remaining batter, in blotches at random onto the fruits. Sprinkle a generous amount of demerara sugar on top.
Bake in a preaheated oven @ 160 - 180 deg C for 30 to 35 minutes. till golden brown and firm.