Preheat the oven to 180 ° C. Grease 4 cups and sprinkle with a little sugar.
Separate eggs. Beat the egg yolks with 2 tablespoons of sugar until frothy. Stir in the quark, flour, cornstarch, lemon zest and lemon juice. Beat the egg white with 1 tablespoon sugar and a pinch of salt until stiff and fold into the egg mixture. Pour the mixture into the cups and place in an ovenproof baking dish. Pour some hot water into the mold and bake the soufflés in the oven for about 15-20 minutes until they are golden brown.