Mix all the nuts, spices, citrus peel, vanilla and flour (every except for eggs and sugar and wafers) into a bowl.

Working in batches, grind the mixture into a rough meal using a food processor. Don't make it into a powder - leave some graininess so the cookies will have a good texture.

In a metal bowl, beat the eggs and powdered sugar together until all the white powder disappears. Heat some water in a big frying pan or pot on the stove, place the egg mixture bowl in the hot water and heat it until it's 40-43°C (you need to make it hot so it brings out the stickiness in the eggs).

Transfer to a mixer or use a beater, and beat the egg mix on low medium speed until it thickens up and turns a little white (You probably have to reheat the eggs at least one time). Beating them to this consistency will give your cookies a wonderful sticky texture!

Add the spice and nut mixture to the egg mixture and gently mix. Cover and let rest for one hour - this will help the mixture thicken up more.

Using a dough scraper card, scoop up a big dollop of the lebkuchen dough and gently scrap it onto the oblaten wafer (scoop up more than you need so you have enough to work with)

While rotating the glass around, gently scrap the dough from the center to the sides - try to leave the center as high as possible like you are trying to form a pyramid. The middle should be nice and thick or else you'll end up with flat lebkuchen.

Place the finished lebkuchen on a baking sheet one by one.

Bake for 15 minutes at 200°C/400°F

Remove from oven. For the sugar coating: brush half of the cookies with thick sugar water/syrup immediately. After the syrup dries, it will give the cookies a nice white frosted look.

For the chocolate covered ones, you have to wait until they dry completely to do the chocolate. When cooled, melt chocolate in a double boiler (Put chocolate in a small metal bowl, heat a pan of water and place the bowl on the hot water until chocolate melts)

Brush over lebkuchen and decorate with almond slivers if you like. Let chocolate dry completely. All done!