4 c. rhubarb, diced
1 c. sugar
3 1/2 tbsp. flour
1 c. brown sugar, packed
1 c. rolled oats
1 c. flour
1/2 c. melted butter

Mix 1 cup sugar and 3 1/2 tablespoons flour together. Put diced rhubarb in 8 inch square pan (or 6 x 10 inch pan). Sprinkle sugar and flour mixture over top of rhubarb. Mix brown sugar, oats, 1 cup flour, and melted butter together. Spread on top. Bake at 375 degrees for 45 minutes.