1 c. sifted flour
3/4 c. old fashioned oatmeal (not quick cooking)
1 c. brown sugar
1/2 c. melted butter
1 tsp. cinnamon
4 c. rhubarb
1 c. white sugar
1 c. water
2 tbsp. cornstarch
1 tsp. vanilla

Mix sifted flour, oatmeal, brown sugar, melted butter and cinnamon together and use half to cover bottom of a 9 inch square baking pan. Arrange rhubarb evenly on top of this crumbly mixture. Cook white sugar, water, cornstarch and vanilla until thick; pour over rhubarb and top with remaining crumbly mixture. Bake at 350 degrees for 1 hour. Serve warm with whipped cream. Also very good with ice cream. Can be baked in microwave for 15 minutes on high.