Rhubarb Oatmeal Bars.

Crust:
1/2 cup chopped nuts
1 1/2 cups rolled oats
1 cup brown sugar
1/4 teaspoon salt
1 1/2 cups flour
1 cup shortening
1/4 teaspoon vanilla

Filling:
3 cups chopped rhubarb
1 1/2 cups sugar
2 tablespoons cornstarch
1/4 cup water
1 teaspoon vanilla

Instructions
Make crust: Combine all ingredients until crumbly. Pat half of mixture into 13 x 9 inch baking pan. Make filling: In saucepan combine rhubarb, sugar, cornstarch and water. Cook until clear. Blend in vanilla. Pour over crust. Sprinkle with remaining crumb mixture. Bake at 350 degrees F for 20 minutes.

http://www.aliciasrecipes.com/Recipe/2218/Rhubarb-Oatmeal-Bars.htm