6 C sliced rhubarb
1 C granulated sugar
2 tbsp cornstarch
1/2 C water
1 tsp vanilla
3/4 C flour
3/4 C packed brown sugar
1/2 C quick oats
1 tsp cinnamon
1/3 C melted butter

Place the rhubarb in a 9 inch square shallow baking dish (or one that holds about 2 qts if a different shape).

In a saucepan, blend together the sugar, cornstarch, and water. Cook, stirring until it boils and becomes thick and clear. Add vanilla and pour over rhubarb in pan.

Mix together the flour, brown sugar, oats and cinnamon. Add melted butter and mix until crumbly. Sprinkle topping evenly over rhubarb.

Bake in a 350°FF oven for 1 hour.