First you need to boil the chicken hearts: put them in salted boiling water (you can add 2 peas of allspice and half a bay leaf) and cook for 20-30 minutes.
For pancakes: lightly beat the eggs, add starch, butter and mix well so that there are no lumps. Preheat a frying pan without oil and, having laid out two tablespoons of the mixture, bake 5 thin pancakes.