Lemon Chiffon Pie with Coconut Whipped Cream

Chiffon pies are fluffy and mousse-like with fillings that rely on gelatin, beaten egg whites, or whipped cream for their light-as-air texture. The lemon chiffon pie here borrows a little from two sources. It is just the right amount of sweet due to the recipe from The Latest Cake Secrets (1934). And it calls for folding beaten egg whites and lightly whipped cream into a lemon-gelatin base thanks to a recipe from Aunt Chick’s P