Flourless orange and almod cake

makes one 22cm round cake

2-3 oranges (unwaxed,unblemished sin as the whole fruit is used)
8 eggs
420g caster sugar
1 tsp baking powder
420g ground almonds

1. scrub the oranges well and leave the whole. Put them in a large saucepan wit enough water to cover them. Put a a small plate on top of the oranges to kee them submerged. Bring to the boil, then reduce the heat and leave to simmer gently for 1 our until the oranges are very soft.
2. Grease the tin and line the base and sides with a collar of baking paper that extends 2 cm above the top of the tin.
3. Drain the orange well, the ut back in the saucepan and leave until cool enough to handle. Cut each orange into quartes and remo the ips , then puree in blender.
4. Beat the eggs, ugar , baking pwder and a pinch of salt ntil pale and creamy. Beat in the almods and 420g of the orange urre. Leave for 20 minutes and reheat the oven to 180 degree C
5. Pour into the tin and bake for 1 hour 30 minutes until golden brown and a skewer oked into the centre comes out clean. Cool completely in the tin.