Ukrainian
Press the farmer cheese twice through a fine sieve or pass it through a meat grinder until completely smooth.
Beat the soft butter with the sugar and the egg yolks until pale, then beat in the cheese, semolina, vanilla, lemon zest and salt; stir in the raisins.
Whisk the egg whites to stiff peaks and fold them gently into the cheese mixture.
Spread the mixture in a buttered 24 cm springform pan and bake at 170C for 55-60 minutes, until set and lightly golden.
Turn off the oven and leave the cheesecake inside with the door ajar for 15 minutes, then cool it completely.
For the glaze, stir the cocoa, sugar, butter and sour cream in a small pan over low heat until smooth and simmer for 2 minutes, then cool slightly.
Pour the glaze over the cheesecake, spread it evenly and chill for at least 4 hours before slicing.