Wash and dry lemon, grate peel and squeeze juice. Cream butter, salt, icing sugar, vanillin sugar and lemon peel. Stir in milk and 4 tablespoons of juice. Knead in flour. Using a pastry squeezer or piping bag, squirt different motifs onto 2 baking trays lined with baking paper, possibly place them on some 1 pistachio. Bake one after the other in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 15-18 minutes.
Let them cool down. Heat the jelly. Coarsely chop the chocolate coating and melt in a hot water bath. Decorate cookies with jelly, chocolate coating and icing sugar. Leave to dry