I got this recipe from another group and it was submitted by Suzan. They are excellent and I refrigerated them and served them with whipped cream or you could use ice cream. Easy to make.
Rhubarb Oatmeal Bars 13x9x2-inch baking pan
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 butter or shortening 1/4 teaspoon baking soda
FILLING: 3 cups chopped rhubarb 1 1/2 cups sugar 2 tablespoons cornstarch 1/4 cup water 1 teaspoon vanilla
Combine all ingredients for crust and mix until crumbly. Pat half of the mixture into a 13x9x2-inch baking pan.
To prepare the filling, combine rhubarb, sugar, cornstarch and water in a medium saucepan and bring to a boil; reduce heat to low and continue to cook, stirring frequently, until mixture is clear. Stir in vanilla. Pour filling over crust. Sprinkle with the remaining crumb mixture. Bake for 20 minutes at 350� for 20 minutes. Allow to cool before cutting into serving sized bars.