Instructions

  1. Topping: Combine flour& sugar in a bowl; using a pastry blender or 2 knives, cut in butter until mixture is in fine crumbs.
  2. Set aside.
  3. PIE: Combine sugar, flour& salt in a bowl; whisk in egg until smooth.
  4. Add rhubarb& toss to coat.
  5. Scrape into pie shell& dot with butter.
  6. Sprinkle topping evenly over filling.
  7. Bake in the bottom third of a preheated 425F oven for 10 minutes.
  8. Reduce heat to 350F& continue baking until topping is golden& filling is bubbly, about 40 minutes.
  9. Remove from oven& cool on a rack.