Pumpkin Crumple Cake

2 cups pumpkin puree (I use the whole can)
1 (12 ounce) can evaporated milk...(you can use more or less.  If you like it more cake like...use less.  I've been known not to use any..if I didn't have it at the time!)
4 eggs (or 1 cup egg substitute)
1 1/2 cups white sugar
2 teaspoons pumpkin pie spice (or to taste)
1 tablespoon vanilla
1 teaspoon salt
1 yellow cake mix
1 cup chopped walnuts (or pecans)
1 cup margarine, melted
whipped topping if desired

Preheat oven to 350 degrees. Spray 9 X 13 inch pan with cooking spray

Combine pumkin, evaporated milk, egg, sugar, pumpkin spice and salt.
Mix well.
Spread into prepared pan.

Sprinkle the yellow cake mix over the top of the pumpkin mixture and pat down.
Sprinkle the chopped nuts over the cake mix then drizxzle the melted butter over the top.

Bake at 350 for about an hour...hour 10 minutes.

top with whipped topping if desired.