4 c. rhubarb
1 c. sugar
2 tbsp. cornstarch
1 c. water
3/4 c. oatmeal
1 c. flour
1 c. brown sugar
1/2 c. shortening
1 tsp. cinnamon
1/2 c. nuts (optional)

Cook rhubarb, sugar, cornstarch and water in saucepan until clear and thick. Combine remaining ingredients in a mixing bowl. Mix well with pastry blender or spoon. Pour mixture in a 9x9 baking pan. Top with crumble mixture. Bake 1 hour at 350 degrees. May serve with whipped cream or vanilla ice cream.