Mix everything, if desired, add lavrukha and pour boiling water, so that only the duck is covered. Salt, pepper. Spread the potatoes on top, so that they do not float in the water, in order to avoid turning them into porridge. Cover with a lid and, reducing the heat to medium-low, pour the potatoes, cover with a lid and simmer for an hour. After that, add the apples and simmer for another 15 minutes, without stirring.