1/2 c. soft butter
3/4 c. oatmeal
1 c. brown sugar
1 c. flour

Combine all the ingredients; mix to crumbly stage. Press 2/3 of mixture into a 9-inch square pan. Cover with 3 1/2 cups raw rhubarb.

FILLING:

1 c. sugar
2 tbsp. cornstarch
Red food coloring
1 c. water
1 tsp. vanilla

Cook over low heat until creamy. Then pour over rhubarb. Sprinkle the rest of the crumbly mixture on top. Bake at 350 degrees for 30 minutes or on High in microwave for 15 minutes.