Preheat the oven to 300 F

Cook the oranges in boiling water over medium heat for 2 hours

Cool the oranges a few minutes

Put the ground almonds in the food processor, add vanilla, sugar, baking powder and oranges

Add to the orange mixture the eggs one by one

Prepare and butter a hinged mold or put a parchment paper in the bottom of a round pan

Heat 50 minutes and let cool 30 minutes