3 egg whites, room temp.
1/4 tsp. cream of tartar
6 tbsp. sugar
1 tbsp. grated lemon zest

In large mixing bowl beat egg whites until foamy. Add cream of tartar; beat on high speed until soft peaks form. Gently fold lemon rind into beaten egg whites.

Drop mix by tablespoon on 2 buttered and floured baking pans. Bake in preheated 250 degree oven for 1 hour.

Turn oven off, do not open oven door, leave in oven 1 hour. Then transfer cookies to wire racks to cool.