Combine first five ingredients. Let stand 15 minutes. Meanwhile prepare pastry and line 9” inch pie plate with pastry. Fill with rhubarb mixture. Dot with butter.
Step 2
Adjust top crust. Cut slits and seal. Flute edges and bake at 400’ F. for 50 minutes.
Step 3
If crust edges brown to quickly cover with foil part of the baking time.