Peel, quarter, core and cut apples into pieces. Bring to the boil with 4-5 tbsp. icing sugar, vanilla sugar and 4-5 tbsp. water. Cover and cook over medium heat for about 5 minutes. Mix starch with 1 tablespoon of water.
Stir into the apples and simmer for about 1 minute. Stir in egg liqueur. Let the compote cool down.
Put half of the compote into four ovenproof moulds (approx. 200 ml each). Stir yoghurt until smooth and spread on top. Coat with the rest of the compote.
Beat the egg whites until stiff, adding 60 g icing sugar at the end. Place the meringue mixture on the compote and carefully brown with a kitchen gas burner (or see tip). Decorate with melissa and serve immediately.