Rhubarb Crumble
["1 c. brown sugar", "3/4 c. quick rolled oats", "1 c. flour", "1/2 c. melted butter", "1 tsp. cinnamon", "4 c. diced rhubarb", "1 c. sugar", "2 tsp. cornstarch", "1 c. water", "1 tsp. vanilla"]
["Mix brown sugar, oats, flour, butter and cinnamon.", "Press 1/2 of mixture into a 9-inch square pan.", "Cover with rhubarb.", "Mix sugar and cornstarch together.", "Add water and vanilla.", "Cook until thick and clear.", "(Add 3 drops red coloring.)", "Pour over rhubarb. Sprinkle remaining brown sugar mixture on top.", "Bake at 350\u00b0 for 1 hour.", "Top with whipped cream or ice cream."]
["brown sugar", "rolled oats", "flour", "butter", "cinnamon", "rhubarb", "sugar", "cornstarch", "water", "vanilla"]