Triple Citrus Chiffon Cake With Lemon Custard

Ingredients

• 2 1/4 c. sifted cake flour
• 1 Tbsp. baking powder
• 1/2 tsp. salt
• 5 large egg yolks
• 1 large egg
• 1 1/3 c. granulated sugar
• 1/2 c. vegetable oil
• 1 heaping Tbsp. grated orange rind
• 1 tsp. grated lemon rind
• 2/3 c. orange juice
• 1 Tbsp. fresh lemon juice
• 5 large egg whites
• 1/4 tsp. cream of tartar
• 2 c. heavy cream, whipped with 1/4 c. granulated sugar