Let egg whites stand at room temperature for 30 minutes
Sift flour and salt and set aside
Coat a 15x10x1 baking pan with nonstick cooking spray
Line with wax paper and coat the paper with spray
In a mixing bowl beat yolks until slightly thickened Gradually add sugar and beating until thick and lemony colored Add orange peel lemon juice and vanilla
Add sifted flour mixture and mix well
Batter will be thick
In another bowl beat egg whites until soft peaks form
Fold into batter
Spread into prepared pan
Bake at 350 for 12-15 minutes or until cake springs back when lightly touched in center
Cool on wire rack 5 minutes Turn onto a kitchen towel
Sprinkle with 1 Tbsp powdered sugar Gently pull wax paper off and roll cake up jelly roll style starting with short side
Cool completely on wire rack
Unroll cake- spread marmalade evenly over cake within 12 inch of edges Roll up again seam side down
Sprinkle with remaining sugar Wrap and place in refrigerator one hour