Rhubarb Crunch
["4 c. finely diced rhubarb", "1/2 c. sugar", "2 Tbsp. cornstarch", "1 c. water", "1/2 tsp. vanilla", "1 c. flour", "3/4 c. quick cooking oatmeal", "1/2 c. brown sugar", "1 tsp. cinnamon", "1/2 c. melted butter"]
["Place rhubarb in greased baking dish.", "Combine 1/2 cup sugar, cornstarch and water; cook and stir until thick and clear.", "Add vanilla and pour over rhubarb.", "Combine remaining ingredients; sprinkle over rhubarb.", "Bake in moderate oven (350\u00b0) for 40 to 45 minutes.", "Serve warm, plain or with whipped cream."]
["rhubarb", "sugar", "cornstarch", "water", "vanilla", "flour", "oatmeal", "brown sugar", "cinnamon", "butter"]