2
In large bowl, beat egg whites and cream of tartar with electric mixer on medium speed until foamy. Gradually add sugar, 1 tablespoon at a time, beating on high speed until stiff glossy peaks form and sugar is almost dissolved (about 6 minutes). Beat in vanilla. Spoon meringue onto cookie sheet. Shape into 10-inch round, using circle as a guide and building up sides with back of spoon.