1 c. flour
3/4 c. uncooked oatmeal
1 c. brown sugar, packed
1/2 c. butter, melted
1 tsp. cinnamon
4 c. rhubarb, chopped fine
2 tbsp. cornstarch
1 c. water
1 c. sugar
1 tsp. vanilla

Mix flour, oatmeal, brown sugar, melted butter and cinnamon until crumbly. Press half of mixture into greased 9 inch pie pan. Combine rhubarb, cornstarch, water, sugar and vanilla in saucepan, cook until thick. Pour in crust, top with remaining crumbs. Bake at 350 degrees for 45 minutes.