A delicious rhubarb bar, great for the first rhubarb of the season, or to use up the last. I have found that cooking the rhubarb in half water half fruit juice (I've used orange or pineapple) enhances the flavour nicely.
Crust: Combine all ingredients until crumbly.
Pat half of mixture into 13x9" baking pan and bake for about 20 minutes before pouring filling on top.
Filling: In saucepan combine rhubarb, sugar, cornstarch and water.
Cook until clear.
Blend in vanilla.
Pour over baked crust.
Sprinkle with remaining crumb mixture.
Bake at 350° for 20 minutes.
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