Rhubarb Crunch

This recipe came from Mom. When she makes this dessert, people come to visit.

1 1/4 c. oatmeal
1 1/4 c. flour
1 c. brown sugar
2/3 c. butter
1/4 tsp. salt
1 tsp. cinnamon
1 to 1 1/2 c. sugar
3 tbsp. flour
1 1/2 c. water
1 tsp. vanilla
5 c. chopped rhubarb

1. Preheat oven to 350 F.
2. Grease a 9 x 13 pan.
3. For crust - mix oatmeal, flour, brown sugar, butter, salt, and cinnamon. Put 2/3 on bottom of pan and save 1/3 for the topping.
4. For filling - cook sugar, flour, and water until thick. Remove from heat. Add vanilla.
5. Fold in rhubarb. Pour on crust. Sprinkle with topping.
6. Bake 1 hour.