Rhubarb Crumble

Combine melted butter, rolled oats, first amount of flour and brown sugar. Firmly press 3/4 of mixture into a 9 inch pie plate. Cover with rhubarb.

Combine sugar and second amount of flour. Sprinkle over rhubarb. Cover with remaining crumb mixture. Bake at 350 º for 30 - 40 minutes.

Serve warm with ice cream.