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

Mix flour, oatmeal, brown sugar, butter and cinnamon together. Put 1/2 mixture into greased 9-inch pan. Combine sugar, cornstarch, water and vanilla. Cook until thick and clear. Pour over rhubarb. Top with remaining mixture. Bake at 350 degrees for 1 hour. Serve warm and top with whipped cream.