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

Mix flour, oatmeal, brown sugar and cinnamon until crumbly. Press half of crumbs in greased 9 inch pan. Cover with diced rhubarb. In a small saucepan combine sugar, cornstarch, water and vanilla. Cook until thick and clear. Pour over rhubarb; top with remaining crumbs. Bake at 350 degrees for 1 hour. Cut in squares. Serve warm.