Separate the egg. Mix egg yolk with buttermilk, semolina and salt. Leave to swell for about 10 minutes. Season quark with lemon juice and sweetener. Wash and halve strawberries
Beat the egg white with the whisk of the hand mixer until stiff, allowing the powdered sweetness to trickle in. Fold loosely into the semolina mixture. Heat the oil. Fry 3-4 lentils from the semolina mixture until golden brown. Arrange hot lentils with strawberries and quark cream. Decorate with mint if desired.