Preheat your oven to 180°C (350°F). Line two oven trays with baking paper.
Place the almond meal, sugar and flour into a bowl and mix to combine.
In a separate bowl, whisk the 2 egg whites with the salt until soft peaks form. Fold into the dry mix with the vanilla and rind and mix to form a dough. It’s easiest to use your hands to squish it into a dough.
Place the flaked almonds into a shallow bowl. Form the dough into oval size biscuits, around 5–6 cm long and 2 cm thick. Brush with the extra beaten egg white and press into the flaked almonds
Cook for 20–25 minutes, or until golden. Cool on a wire rack, then dust with icing sugar to serve
