Maple Pumpkin Pie

1 16 ounce can solid pack pumpkin, or use about 2 cups of cooked pumpkin
1 cup evaporated milk
3/4 cups maple syrup
3 eggs, slightly beaten
2 tablespoons all-purpose flour
1 teaspoon ground cinnamon
1/2 teaspoon ground ginger
1/2 teaspoon rum extract(optional)
Pastry for a single 9-inch pie crust

Place the pastry into a 9-inch pie plate. Combine remaining ingredients in a large bowl; beat until well blended. Pour into prepared pastry. Bake at 400 degrees F for 45 minuts or until knife inserted near center comes out clean.