Sernik

Instructions

1. 1 Press twarog through a fine sieve twice for smoothness. Cream butter with sugar until fluffy.
2. 2 Beat egg yolks into the butter mixture one at a time. Add vanilla and lemon zest.
3. 3 Fold in the sieved twarog and flour until smooth.
4. 4 Whip egg whites with salt to stiff peaks. Gently fold into the cheese mixture.
5. 5 Pour into a buttered and floured springform pan. Bake at 170C (340F) for 1 hour until set and golden.
6. 6 Turn off oven, crack door open, and let cheesecake cool gradually. Dust with powdered sugar before serving.