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

Step 1: Combine sugar, cornstarch, water and vanilla.

Step 2: Cook and stir until thick and clear.

Step 3: Combine flour, oats, brown sugar, butter and cinnamon. press half into bottom of greased 9 inch layer pan.

Step 4: Cover crumble with rhubarb, powdered sugar mixture over rhubarb and top with remaining crumble.

Step 5: Bake at 350 degrees for 1 hour.