Orange Sponge Cake Roll

Directions

1. 1
   Place egg whites in a large bowl; let stand at room temperature for 30 minutes. Line a greased 15x10x1-in. baking pan with waxed paper; coat the paper with cooking spray and set aside.
2. 2
   In a large bowl, beat egg yolks on high speed for 5 minutes or until thick and lemon-colored. Gradually beat in sugar. Stir in the orange zest, lemon juice and vanilla. Sift flour and salt together twice; gradually add to yolk mixture and mix well (batter will be very thick).
3. 3
   In a large bowl with clean beaters, beat egg whites on medium speed until stiff peaks form. Gradually fold into batter. Spread evenly into prepared pan.
4. 4
   Bake at 350° for 12-15 minutes or until cake springs back when lightly touched in center. Cool in pan on a wire rack for 5 minutes.
5. 5
   Invert onto a kitchen towel dusted with 1 tablespoon confectioners' sugar. Gently peel off waxed paper. Roll up cake in the towel jelly-roll style, starting with a short side. Cool completely on a wire rack.
6. 6
   Unroll cake; spread marmalade evenly over cake to within 1/2 in. of edges. Roll up again. Place seam side down on a serving platter. Cover and refrigerate for 1 hour. Dust with remaining confectioners' sugar. Garnish with orange peel strips if desired.