I don't know the history of this dish but since it says Pittsburgh and that is where I was born and raised it HAS to be good!!!
- Cook first 3 ingredients in boiling water to cover in a saucepan 15 minutes; drain and add pimiento strips.
- Cook cheese and next 4 ingredients in a saucepan over low heat, stirring costantly, until thoroughly heated and cheese melts.
- Pour cheese sauce over potato mixture, and spoon into a baking dish.
- Top with breadcrumbs, and dot with butter.
- Bake at 350 degrees F.
- for 20 to 30 minutes.