Lviv cheesecake

Preheat oven to 180°C / 350°F degrees.

Make the batter. Mash salt, sugar and vanilla sugar into unsalted butter. Add lemon and orange zest.

Separate egg whites from egg yolks.

Add egg yolks to the butter mix one at a time, mixing with a whisk after each one until well-blended.

Grate boiled potatoes with a fine grater and add to the egg-and-butter mix.

Put the cheese through a sieve and add to the mix. Add raisins and knead well.

Beat egg whites until stiff and gently fold into the batter.

Grease the baking tray with unsalted butter and sprinkle with flour. Gently move the batter into the tray and smooth the surface.

Sprinkle the cheesecake with chopped walnuts. Bake for 1 hour.

Make the chocolate glaze. Mix chopped chocolate with unsalted butter and heavy cream in a heat-resistant bowl. Melt the mixture over boiling water, stirring constantly, until it is well-blended.

Pour the chocolate glaze over the cooled cooked cheesecake.