Toast the almonds without adding any fat and chop roughly.
In a bowl mix the flour with the salt, baking powder, vanilla sugar and sugar. Add the eggs, orange rind and 1 -2 tbsp orange juice and knead to a smooth dough.
Mix in the almonds.
Shape into 2 rolls approximately 6 cm in diameter, place on a greased baking tray, flatten slightly and brush with egg yolk.
Bake in a hot oven (180°) for about 15 minutes, until lightly browned.
Take out, brush with the rest of the orange juice and cut into approximately 1 cm slices. Lay the slices on the baking tray and bake for a further 10-15 minutes, until crisp. Turn once.