1 3/4 C. oatmeal
1 3/4 C. flour
1 C. brown sugar
1 tsp. baking soda
1 C. butter
3 T. cornstarch
1 1/2 C. sugar
2 C. sour cream
2 C. raisins
4 egg yolks

Combine oatmeal, flour, brown sugar, baking soda and butter. Press 3/4 of the mixture into a 9×13″ pan. Bake at 350º for 10 minutes. Mix rest of ingredients and cook over medium heat until thick. Stir mixture constantly so it does not burn. Pour this over bottom crust and top with remaining crumb mixture. Bake at 350º for 20 minutes.