Preheat 350

Food process sugar until super fine. Sift half of the sugar with salt and cake flour. Set remaining sugar aside to be added to whites.

Combine egg whites (room temp), vanilla, cream of tartar, lemon zest. Stir on med high speed until stiff peaks form, about 4 minutes

Reduce speed and add remaining sugar until just combined.

Gradually sprinkle in cake flour and hand fold into the mixture a little at a time. Don't over mix.

SPOON batter into a 9 or 10 inch ungreased tube pan and bee for 35 minutes until top is golden brown and springs back when touched.

Cool Completely.

Lemon Glaze -- combine 1 cup confectioners sugar and 3-4 tablespoons of lemon juice and 1/2 teaspoon of lemon zest.