Separate the whites from the yolks. Beat egg yolks with butter and powder.

Separately, beat egg whites with 1 tbsp of powder until not very dense peaks.

To the yolks add the zest and orange juice, the finely chopped almonds.

Gently stir proteins and as well gently with a spatula add flour mixed with baking powder.

The form in diameter 18-20 cm oil and spread the bottom of the greased paper. Pour half of the batter.

On top spread a layer of jam, gently flatten.

Spread rest of the dough. Sprinkle with almond flakes. Bake at 170 deg. about 50 minutes. Cool.

Preparation of jam: 2 orange to clear it from skin and bones, cut into large pieces. The other 2 pour boiling water, leave for 15 minutes. Straight cut with peel, but without seeds and add to the rest. All grind in a blender. You can just slice, then jam with pieces. Add sugar and lemon (if need be, and most often should). And cook over low heat, stirring occasionally, until thick (about 30 minutes). 10 minutes before the end of cooking, put a cinnamon stick. Cool.