Put the almonds and sugar in the bowl, grind: 30 sec on max speed and set them aside.
In the clean jug insert the butterfly and put the egg whites and a pinch of salt, whisk: 4 mins 37° speed 4.
Now in a fairly large bowl with the help of the spatula, add the egg whites to the mixture of almonds and sugar that was put aside and a teaspoon of amaretto liquor.
Shape small balls the size of a walnut with your hands or using two tea spoons.
Pass them through sugar and put them on a tray.
Bake in pre heated oven at 160° C for around 15 mins.
Let cool down completely and serve... Buon appetito!
For an optimal browning, pass them under the grill just 2 minutes so that the surface is coloured a little, without drying them too much.