Pre-cook rice in 0.5 l of water for 5 minutes. Bring the milk to the boil, add the pre-cooked rice and cook for another 15 minutes.
Beat eggs with sugar until frothy, add lemon juice and cognac. Mix this mixture with rice (stir in).
Brush a dish (about 26-28 in diameter, preferably a gratin dish) with the butter and fill it with the mixture. Smooth them out and sprinkle with the flaked almonds. Bake for 50 - 60 minutes at 180 degrees.