Orange and Almond Cake

A wonderful cake made without flour!  This has great flavour and isn't too sweet.

2 large navel oranges, unpeeled (I used 4 clementines)
3 eggs, separated
1 1/2 cups ground almonds
1 1/4 cups granulated sugar

GARNISH
3 tbsp icing sugar
Orange slices

1. Simmer oranges in water to cover for 1 1/2 hours.  Drain, cool and chop up.  Puree in food processor. (I used a blender and it was fine)
2. Preheat oven to 375F.  Butter and flour an 8 or 9 inch springform.  Line base with parchment paper.
3. Beat egg yolks, then add to oranges in processor together with almonds and 1 cup sugar.  Pulse until well mixed (once again, I just used a blender).
4. Whisk egg whites until frothy.  Keep beating while adding remaining sugar.  When thick and glossy, stir into orange mixture.  Spoon into springform. Bake for 1 hour or until a cake tester comes out clean.
5. Cool in pan, and turn out.  Sprinkle with icing sugar and serve with orange slices.

Serves 10