Pumpkin Dessert

1 pkg. Spice Cake Mix
1/2 Cup milk
3 eggs
1/2 Cup brown sugar
1 square margarine
1/2 Cup oats
1 small can pumpkin (or 1/2 lg. can)
2 Tb. margarine
(optional)--1/2 cup or so of chopped nuts

Pour cake mix into a bowl. Take out 1 cup of dry mix and set aside. To remainder add one egg and square of margarine. Mix well and press into a 9 X 13, greased and floured pan. Combine pumpkin, two eggs and milk. Blend well and pour over cake crust. Take the remaining dry cake mix and cut in 2 Tb. margarine, brown sugar and oats. Sprinkle over the pumpkin mixture. Bake at 350 degrees about 45 minutes, or until set. Sprinkle chopped nuts over the top for the last 15 minutes if desired.