...  until the mixture begins to thicken; about 20 minutes. Once thickened, in a separate bowl, beat the egg whites until stiff and fold them into the mixture. In a separate bowl using a mixer whip whipping cream until fluffy then fold into watermelon mixture. Once everything is combined well, pour into prepared crust. Refrigerate until firm. Garnish each serving with whipped topping. Then enjoy your watermelon chiffon pie. As a side note, when you think Chiffon, you probably first think of lemon chiffon pie as it’s the most common flavor. However, just because it’s most common, doesn’t mean you can’t experiment with other flavors as we have done here. Chiffon can literally be made with just about any flavor you want; from strawberries, blueberries, peach or pumpkin to chocolate or coffee – the options are ...