I did half portions. Separate 6 egg whites from the yolks. To the yolks add the sugar and grind until they turn white. Then add the zest (I have orange and lemon) and stir.

To proteins add a little lemon juice and beat with a mixer until "hard" peaks (first, beat on low speed, gradually accelerating).

To the beaten yolks add the sifted flour and starch, then enter the melted butter.

Gently enter into the dough beaten egg whites using silicone spatula. Whip is not necessary! Put the dough in the form. I used silicone size 22 x 11 (don't forget, I made a half portion); if You have a regular, brush it with melted butter and sprinkle with flour or dry powdered sugar. Form to Bang on the table so the dough is evenly distributed. Put in a preheated 170 degree oven. Bake for 15 minutes.

This recipe uses peeled blanched almonds. You can buy ready, but you can do yourself. I chose the second option. It is necessary to throw the almonds in boiling water and leave for 3-4 minutes. Drain nuts in a colander, then shift for a few minutes in cold water or a bowl of ice. Re-drain the water and dry with a towel. Clean (cleaned very easy). Leave the almonds to dry. In any case not warm it in the oven or microwave, we don't need the toasted almonds. I left to dry for a day near the battery.

Grind the almonds in a blender, add sugar and whites, mix well.

After 15 minutes, sprinkle almond crumb cake. Send in the oven for another 30-40 minutes. Honestly, I was worried that the cake will not rise. First, open the oven during cooking, and secondly, there is a heavy nutty topping. But everything turned out fine, he has grown up well. If someone is going through, maybe for reliability, add to the dough a little baking powder. But I and without it all came out. The finished cake to cool, then to get out of shape and cut.