Preheat oven 375 degrees. Grease 9x13-inch pan.
Prepare potato stuffing: Melt 1/2 cup butter in large skillet; saute onion and celery for 5 minutes.
Turn into large mixing bowl. Add potatoes, eggs, dried bread cubes, poultry seasoning, parsley, salt and pepper; mix well. Spread in pan.
Arrange chicken breasts, skin side up, on stuffing; dot with remaining butter or margarine. Sprinkle with paprika.
Bake in preheated oven, 375 degrees, for 1 hour 15 minutes or until nicely brown and chicken done.
Note: "I use the equivalent in instant mashed potatoes and it works fine. Make a little stiffer though."