Thanks to CSA member Judy Sinasac for the following recipe. She said that she searched for a recipe that wasn’t too sweet.
1 1/2 lb rhubarb, trimmed and cut into 1/2 inch cubes -about 6 cups
3/4 cup sugar
1/4 cup a.p. flour
1/2 tsp cinnamon
Mix well, spread in greased 8 (9″) cake pan
1/2 cup a.p. flour
1/2 cup whole wheat flour
3/4 cup brown sugar
3/4 cup rolled oats (regular, not quick cooked)
1/2 cup butter, melted
For the topping, toss everything but the butter together. Drizzle in butter, mix well. Sprinkle over the rhubarb. Bake in 375 F oven for 30 minutes.