1 c. flour
1 c. brown sugar
3/4 c. oatmeal
1/2 c. butter, melted
1 tsp. cinnamon

Mix crust ingredients until crumbly. Press 1/2 of mixture into 9 inch pan. Cover with 4 cups rhubarb. 1 c. water 2 tbsp. cornstarch 1 tsp. vanilla

Cook over medium heat until thickened and clear. Pour over rhubarb. Crumble remainder of crust/topping mixture over top surface and bake at 350 degrees for 1 hour.