Rhubarb Bars
["4 c. fresh rhubarb", "3 Tbsp. cornstarch", "1 1/2 c. sugar", "1/4 c. water", "1/4 tsp. salt", "1 tsp. vanilla", "1 1/2 c. flour", "1 1/2 c. oatmeal", "1 c. brown sugar", "1/4 tsp. baking powder", "1 c. shortening", "1/2 c. nuts, optional"]
["Cook rhubarb, cornstarch, water and salt until thick. Add vanilla. Cool. Combine flour, oatmeal. brown sugar and soda. Cut in shortening. Add nuts to flour mixture. Put 3/4 of flour mixture in bottom of 9 X 13 pan. Pour cooled rhubarb mixture over crust mixture. Sprinkle with remaining flour mixture. Bake at 375\u00b0 for 30 minutes."]
["fresh rhubarb", "cornstarch", "sugar", "water", "salt", "vanilla", "flour", "oatmeal", "brown sugar", "baking powder", "shortening", "nuts"]