Bring the cherry nectar, cinnamon, lemon peel and 1 tablespoon of sugar to the boil. Stir cornflour and 2 tablespoons of water until smooth and pour into the juice. Bring to the boil again while stirring and remove from the stove.
Remove lemon peel and let the juice cool down. Separate the egg. Mix quark, milk, remaining sugar, vanillin sugar and egg yolk until smooth. Beat egg white and cream separately until stiff and fold in. Divide the quark cream into 4 glasses.
Pour the cherry sauce onto the quark and fold in lightly. Keep cool until serving.