Lemon Curd Layer Cake

Name: Lemon Curd Layer Cake
Ingredients: 2 1/3 cups sugar; 2 teaspoons cornstarch; 1 cup fresh lemon juice; 4 large eggs; 4 large egg yolks; 3 /4 cup (1 1/2 sticks) unsalted butter, cut into 1/2-inch pieces; 3 /4 cup powdered sugar; 2 cups chilled whipping cream; 1 1/2 cups cake flour; 1 1/2 cups sugar; 2 1/2 teaspoons baking powder; 3 /4 teaspoon salt; 1 /4 cup vegetable oil; 1 /4 cup orange juice; 1 1/2 teaspoons grated lemon peel; 8 large egg whites; 1 /4 teaspoon cream of tartar; Lemon slices, halved, patted dry