Family Tested & Approved
In a medium sauce pan combine rhubarb,sugar, cornstarch, water, vanilla,and soda.
Stirring constantly bring to a boil and cook till thick and bubbly, rhubarb should be cooked down. Set aside.
In a large mixing bowl cut butter into oats, flour, sugar, and nuts until crumbly.
Spray a 13x9" pan (I use pam) pat 3/4 of the crumb mixture in the bottom of the pan.
Spread rhubarb filling over crumb mixture in pan sprinkle rest of crumb mixture on top.Bake at 375 degrees for 30-40 minutes
Remove from oven cool in pan, on wire rack ,makes about 2 dozen bars.