Beat the egg whites and lemon juice with the whisk of the hand mixer until stiff, gradually adding vanillin sugar and sugar. Beat until the sugar is completely dissolved and the egg white mass is firm enough to cut.
Fold in the almonds. Pour meringue into a piping bag with a perforated spout. Spray onto two baking trays lined with baking paper approx. 4 cm long strips. Dry in the preheated oven (electric cooker: 150 °C/ gas: level 1) for about 20 minutes one after the other.
Remove from the oven and let it cool on a cake rack. In the meantime, roughly chop the chocolate coating and melt it in a hot water bath. Dip almost half of the meringue sticks into the couverture and let them dry on a cake rack.
Decorate as desired with halved or ground pistachios.