Pastry: Preheat oven to 425°F (220°C). Beat shortening and sugar together on medium speed of electric mixer until fluffy. Beat in flour and cornstarch. With well-floured hands, press mixture into bottom and up the sides of 11” (28 cm) flan pan with removeable bottom. Prick bottom and sides with a fork. Bake in preheated oven, 15 minutes.

Filling: Heat 2 cups (500 mL) evaporated milk in medium saucepan over medium heat. Combine sugar, cornstarch and cocoa in a medium heat proof bowl. Whisk in remaining ½ cup (125 mL) evaporated milk. Beat in eggs. Slowly add hot milk to bowl. Stir to combine. Pour mixture into saucepan. Bring to a boil, reduce heat and cook, stirring for 2 minutes or until thick. Meanwhile, place chocolate in a large heat proof bowl. Strain hot mixture through a sieve over chocolate. Stir until chocolate melts and mixture is smooth. Stir in vanilla. Place plastic wrap directly on surface of filling to prevent a skin from forming. Refrigerate until mixture is cold. Spoon cold mixture into pie crust and garnish with raspberries. Refrigerate for at least 1 hour before serving.