Mom'S Rhubarb Crunch
["4 c. rhubarb, chopped", "3/4 c. white sugar", "2 Tbsp. cornstarch", "1 c. water", "1/2 tsp. vanilla", "1 c. flour", "3/4 c. oatmeal", "1 c. brown sugar", "1 tsp. cinnamon", "1/2 c. melted butter"]
["Put rhubarb in a 11x7 pan.", "Combine sugar, cornstarch, and water.", "Cook and stir until thick and clear; add vanilla.", "Pour over rhubarb.", "Combine remaining ingredients, and crumble over rhubarb.", "Bake 350\u00b0 40-50 minutes."]
["rhubarb", "white sugar", "cornstarch", "water", "vanilla", "flour", "oatmeal", "brown sugar", "cinnamon", "butter"]