Instructions

1. 1
   Preheat the oven to 350 °F (180 °C).
2. 2
   Grind the hazelnuts to in a food processor until fine. You should have about 3½ cups.
3. 3
   Whip sugar and egg yolks until light yellow.
4. 4
   Whip the whites until soft peaks form.
5. 5
   Fold the ground nuts and the egg whites into the egg yolk mixture.
6. 6
   Pour into a shallow wide-brimmed oven-safe dish.
7. 7
   Bake for 30 minutes until the surface is golden brown.