Rhubarb Crunch
["3/4 c. uncooked oatmeal", "1/2 c. melted margarine", "1 c. sifted flour", "1 c. brown sugar, firmly packed", "4 c. diced rhubarb", "1 c. sugar", "1 c. water", "2 tsp. cornstarch"]
["Mix uncooked oatmeal, melted margarine, sifted flour and brown sugar until crumbly.", "Press half the crumbs into greased 10-inch baking pan.", "Cover with diced rhubarb.", "Cook sugar, water and cornstarch until thick and clear.", "Pour over rhubarb; top with remaining crumbs.", "Bake in 350\u00b0 oven for 1 hour.", "Cut in squares and serve warm with whipped cream of ice cream."]
["oatmeal", "margarine", "flour", "brown sugar", "rhubarb", "sugar", "water", "cornstarch"]