Almond Orange Passover Cake Recipe

Beat egg whites in small bowl with electric mixer on high speed until soft peaks form. Gradually add 1/2 cup of the granulated sugar, beating until stiff and shiny; set aside.
BEAT egg yolks and remaining 1/2 cup granulated sugar in large bowl with electric mixer on medium speed 10 min. or until thick and lemon colored. Add almonds, orange peel and juice; beat 1 min. or until well blended. Gently stir in matzo cake meal and potato starch. Add egg white mixture; stir gently until well blended. Spread into ungreased 10-inch tube pan.
Bake until golden brown. Invert cake onto wire rack; cool completely in pan. Loosen cake from pan; remove from pan to serving plate. Sprinkle with the powdered sugar.