Lemon Curd Mousse Cake

INGREDIENTS

• 4 large eggs
• 2 cups shortbread cookie crumbs (about 7 1/2 ounces)
• 1 1/2 cups chilled heavy whipping cream
• 2 1/3 cups sugar
• Lemon slices, cut into quarters (garnish)
• 4 teaspoons cornstarch
• 4 teaspoons unflavored gelatin
• 3/4 cup (1 1/2 sticks) unsalted butter, cut into 1/2-inch cubes
• 1/4 cup (1/2 stick) unsalted butter, melted
• 6 large egg whites
• 4 large egg yolks
• 5 tablespoons water
• 3/4 cup sugar
• 1 cup fresh lemon juice
• Nonstick vegetable oil spray