1 c. sifted flour
3/4 c. quick, uncooked oatmeal
1 c. brown sugar
1/2 c. melted shortening
1 tsp. cinnamon
4 c. diced rhubarb
1 c. white sugar
1 c. water
1 tsp. vanilla
2 tbsp. cornstarch

Mix flour, oatmeal, brown sugar, shortening and cinnamon until crumbly. Press half of mixture into greased 9 inch square baking pan. Pour in diced rhubarb. Cook sugar, water, cornstarch and vanilla over low heat until thick and clear. Pour over rhubarb and top with remaining crumbs. Bake at 350 degrees for one hour.