maple and walnut sweet potato pie

Ingredients

• 2 cups crushed graham crackers
• 6 tablespoons melted butter
• 2 teaspoons sugar
• 1/4 teaspoon ground cinnamon
• 1 cup chopped walnuts
• FILLING
• 2 cups sweet potatoes canned
• 1/4 cup instant vanilla pudding
• 1/2 cup light brown sugar packed
• 1/3 cup pure maple syrup
• 1 cup half and half
• 2 large eggs
• 2 tablespoons melted butter
• 1/2 teaspoon vanilla
• 1/8 teaspoon nutmeg
• 1/4 teaspoon salt
• 1 can whipped cream