Rhubarb Crunch
["1 c. flour", "1 c. brown sugar", "1 tsp. cinnamon", "3/4 c. oatmeal", "1/2 c. melted butter", "4 c. diced rhubarb", "1 c. sugar", "2 Tbsp. cornstarch", "1 c. water", "1 tsp. vanilla"]
["Mix until crumbly; press half of crumbs into greased 9-inch pan.", "Cover with rhubarb.", "Combine remaining ingredients.", "Cook until thick and pour over rhubarb.", "Top with remaining crumbs. Bake in 350\u00b0 oven for 1 hour.", "Cut into squares.", "Serve warm plain or with Cool Whip."]
["flour", "brown sugar", "cinnamon", "oatmeal", "butter", "rhubarb", "sugar", "cornstarch", "water", "vanilla"]