Mom's Raspberry Rhubarb Dessert -- you can call her Joanie

Raspberry Rhubarb Dessert

1 lb (3c) rhubarb

1 10 oz pkg froz raspberries

1/2 c sugar

3 T cornstarch

1 1/2 c flour

1 c brown sugar

1 c quick oatmeal

1 t cinnamon

1/2 c melted butter

Thaw and drain fruit and add water to make 1 C. Combine sugar and cornstarch blend in liquid and cook and stir until thick and clear. Cover, add fruit and remove from heat. Cool. Mix rest of ingredients and put 2/3 on bottom of 9x9 pan, cover with fruit mixture & sprinkle with remaining crumbs. 325 for 1 hour

I have a memory of my mother usually doubling this into a larger 9x14 sized pan.