Duncan Hines Deliciously Simple Desserts- Lemon Chiffon Cake

Not too long ago on another of my blogs I did a post about chiffon cakes. They seem like a lot of trouble to make. Today I came across a way to make an angel food cake mix into a lemon chiffon cake. It is from Duncan Hines Deliciously Simple Desserts, a Favorite Brand Name Recipe booklet.
Lemon Chiffon Cake
1 package Duncan Hines Angel Food Cake Mix
1 cup water
3 eggs
2/4 cup Crisco oil
1/4 cup all-purpose flour
1 tablespoons grated lemon peel
1/2 teaspoon vanilla extract
Frosting
1 container (16 oz.) Duncan Hines Vanilla Layer Cake Frosting
2 teaspoon butter, melted
1 teaspoon grated lemon peel
Lemon slices, for garnish
Preheat oven to 350 degrees. For cake, combine egg white mixture (blue "A" packet) from mix and water in large bowl. Beat at low speed with electric mixer for 1 minutes. Beat at high speed for 5 to 10 minutes or until stiff peaks form; set aside.
Combine cake flour mixture (red "B" packet) from mix, eggs, oil, flour, 1 tablespoon lemon peel and vanilla extract in large bowl. Beat at low speed until blended. Beat at medium speed for 3 minutes. Fold in reserved beaten egg white mixture. Pour into ungreased 10-inch tube pan. Run knife through batter to remove air bubbles. Bake at 350 degrees for 45 to 55 or until toothpick inserted in center comes out clean. Cool following package direction.
For frosting, combine vanilla frosting, melted butter and 2 teaspoon lemon peel in medium bowl. Stir until thoroughly blended. Frost sides and top of cake. Garnish with lemon slices.