Lost Shepherd's Pie makes one 9 1/2 inch pie, but you can also divide it among 4 6 inch pie plates or cut the recipe in half and make 2 6 inch pies.
This is a good make-ahead pie. Assemble a few hours ahead of time, then bake at 400 as directed. It also freezes well. If you freeze it before baking, expect the bake-time to be little longer (or just thaw it before baking).