In a bowl, mix the almonds with all the other ingredients up to and including the honey. Beat the egg whites with the salt until stiff, mix in, quickly combine to form a dough, cover and chill for approx. 3 hrs.
Roll out the dough between two sheets of baking paper to a thickness of approx. 1 cm. Remove the top sheet of paper, cut the dough into approx. 4 x 2 cm rectangles, place on two baking trays lined with baking paper.
Approx. 13 mins. per tray in the centre of an oven preheated to 180°C. Mix the icing sugar, lemon juice and schnapps, spread the icing over the warm gingerbread biscuits and leave to cool on a rack.