Combine the following until crumbly, then press in greased 9x13 pan and bake 10 minutes at 350ºF:

2 cups flour
1 cup brown sugar
1 cup margarine
1 cup oatmeal

Combine the following and pour over hot crust.  Bake for 50 minutes more:

5 eggs
1 cup dark Karo syrup
3/4 cup sugar
dash of salt
1 tsp. vanilla
1 cup broken pecans