Set the oven to 180°C and boil the potatoes in a pan.
Drain the potatoes, add the milk and mash them until smooth.
- 250 g butter (room temperature)
- 250 g sugar
- 1 tbsp vanilla extract
- 3 eggs (large)
Cream the butter and the sugar,then moderately beat in the eggs and vanilla extract.
Fold in the flour and mashed potato,then spoon into the tin and bake for 45 mins.
- 6 tbsp strawberry jam (for coating)
- 2 tbsp unsweetened coconut flakes (for coating)
When ready take out of the oven,spread the jam over the top of the warm sponge and sprinkle with coconut.
Cool, then cut into squares.