1 c. brown sugar
1 c. flour
3/4 c. oatmeal
1/2 c. butter
1 c. white sugar
1 c. water
2 tbsp. cornstarch
4 c. rhubarb

Mix brown sugar, flour, oatmeal, and butter to crumble texture. Set aside. Bring white sugar, water, and cornstarch to a boil, and add 1 teaspoon vanilla. In 8 x 8 pan layer half the crumbs, the rhubarb mixture and the remaining crumbs. Bake one hour at 350 degrees.