Rhubarb Bars
["3 c. cut up rhubarb", "1 1/2 c. sugar", "2 Tbsp. cornstarch", "1/4 c. water", "1 tsp. vanilla", "1 1/2 c. oats", "1/2 tsp. soda", "1 1/2 c. flour", "1 c. shortening", "1 c. brown sugar", "1/2 c. chopped nuts", "pinch of salt"]
["Mix together until crumbly.", "Pat 3/4 of mixture into 9 x 13-inch pan.", "Pour in rhubarb mixture and sprinkle remaining crumbs on top.", "Bake at 350\u00b0 for 30 to 35 minutes."]
["rhubarb", "sugar", "cornstarch", "water", "vanilla", "oats", "soda", "flour", "shortening", "brown sugar", "nuts", "salt"]