Wisk together pumpkin,eggs,milk,sugar,pumpkin pie spice and salt. Pour into a 13 x 9" baking dish. Sprinkle dry cake mix evenly ove top of pumpkin mixture.Top with chopped walnuts. Drizzle with all of the melted butter.
Bake @ 350 for 50-55min. or until golden brown. Top each individual serving with whipped topping. Enjoy!!