Pumpkin Pie with Ginger Walnut Streusel Topping

Ingredients

• ¼ cup chopped fresh ginger root
• ¼ cup sugar
• ¼ cup all-purpose flour
• ⅓ cup light brown sugar
• ½ cup all-purpose flour
• ¼ cup Challenge Butter, cut in ½ cubes
• ¾ cup chopped walnuts
• ½ cup (1 stick) Challenge Butter, cut in ½-inch cubes and freeze
• 1¼ cups all-purpose flour
• ¼ teaspoon salt
• 3 Tablespoons ginger paste
• 2-3 Tablespoons very cold water
• ⅔ cup sugar
• ¾ teaspoon ground cinnamon
• ½ teaspoon ground ginger
• ¼ teaspoon ground allspice
• ½ teaspoon salt
• 2 large eggs
• 1 can (15 ounce) pure pumpkin puree
• 1 can (12 ounce) evaporated milk