Rhubarb Crunch

1 cup flour

1 cup quick cooking oats

1 cup brown sugar

1 tsp cinnamon

1/2 cup butter

In a large mixing bowl stir together the first 4 ingredients. Using a pastry blender, or two knives, cut in butter until mixture resembles fine crumbs. Press half of the mixture into the bottom of a 9x9x2 baking pan.