Gateau de Savoie

Directions

1. 1
   Preheat the oven to 325 degrees, and grease a 10-inch Bundt pan.
2. 2
   Mix together the egg yolks, granulated sugar, and salt in the bowl of an electric mixer, and beat until they are pale yellow and make a thick ribbon, about 3 minutes.
3. 3
   Mix in the vanilla and the lemon zest.
4. 4
   Stir the potato starch or cornstarch with the flour or matzo cake meal in a bowl, and then gently fold it into the egg-yolk mixture.
5. 5
   Beat the egg whites to stiff peaks in a clean bowl with clean beaters.
6. 6
   Mix a third of the egg whites into the egg-yolk batter, and then gently fold in the remainder of the egg whites.
7. 7
   Pour the batter into the greased pan, and bake for 35 to 40 minutes, or until a toothpick inserted into the middle of the cake comes out dry.
8. 8
   Unmold the cake immediately onto a rack, and allow to cool completely.
9. 9
   Dust with confectioners sugar, and serve as is or with fruit syrup, strawberries, whipped cream, or ice cream.