Pumpkin Pie with Toffee Walnut Topping

Bahan-bahan (10 porsi)

• 1 1/2 cups all purpose flour
• 1 tablespoon granulated white sugar
• 1/2 teaspoon salt
• 6 tablespoons (3/4 stick) chilled unsalted butter, (cut into 1/2-inch pieces)
• 3 tablespoons chilled shortening, (cut into 1/2-inch pieces)
• 3 tablespoons (about) ice water
• 1 large egg yolk, (beaten )
• One 15-ounce can unsweetened pumpkin puree
• 2/3 cup packed light brown sugar
• 1 cup half and half cream
• 2 large eggs
• 1/4 cup granulated white sugar
• 1 teaspoon vanilla extract
• 1 1/4 teaspoons ground cinnamon
• 3/4 teaspoon ground ginger
• 1/4 teaspoon ground nutmeg
• 1/4 teaspoon salt
• 1/8 teaspoon ground allspice
• 1/3 cup walnuts, (toasted and chopped)
• 1/2 cup English Toffee bits ((or chopped Skor or Heath Bar))