Ingredients:
3 cups chopped rhubarb
2 tablespoons orange juice
3/4 cup granulated sugar
1/4 teaspoon cinnamon
1 tablespoons butter, cut in small pieces

for the crumble Mixture:
1/4 cup melted butter
1/3 cup brown sugar
2/3 cup sifted all-purpose flour
1/8 teaspoon salt
1/4 teaspoon baking soda
2/3 cup quick cooking oats

Procedure:
Arrange diced rhubarb in a buttered 8-inch square baking dish. Sprinkle with orange juice, 3/4 cup sugar, cinnamon, then dot with the 1 tablespoon of cut up butter.
Combine melted butter with brown sugar. Sift together the flour, salt, and baking soda; mix with oats.
Combine the flour oat mixture with the brown sugar and melted butter mixture. Spread over rhubarb. Bake at 375 degrees for 40 minutes. Serve warm, with ice cream or whipped cream.

Recipe source: About Southern US Cuisine
Picture source: Flickr Roboppy