Preheat the oven to 150C/300F

Place the egg whites in a large clean mixing bowl with the salt. Whisk until they stand in stiff peaks.

Gradually add the Caster sugar until completely incorporated

Add the lemon zest & Vanilla extract and mix again

Fold in the ground almonds and mix, get your hands in and bring together

Roll the dough into thick sausage

Next using a sharp knife cut in 1 cm biscuits and place on a lined baking tray

Sprinkle with Flaked almonds and bake in the pre-heated oven for approx. 25 minutes until they are pale golden in colour

Remove from the oven and leave to cool, dust with LOTS of icing sugar before serving