Oatmeal-Rhubarb Bars

Ingredients

 * 1 cup all-purpose flour
 * ¾ cup oatmeal, uncooked
 * 1 cup brown sugar, packed
 * ½ cup unsalted butter, melted
 * 1 cup sugar
 * 2 teaspoons cornstarch
 * 1 cup water
 * 1 teaspoon vanilla extract
 * 4 cups rhubarb

Directions

 * 1) Mix flour, oatmeal, brown sugar and butter until crumbly.
 * 2) Press ½ into greased 9" pan.
 * 3) Add rhubarb, cut in ½" pieces.
 * 4) Combine sugar, cornstarch, water and vanilla; cook till thick and clear.
 * 5) Pour sauce over rhubarb.
 * 6) Top with other half crumb mixture.
 * 7) Bake at 350°F for 45 minutes.