Preheat oven to 400 degrees F (200 degrees C). Grease a 10x14x2-inch baking pan.Advertisement
Heat margarine in a skillet over medium heat; stir in onion. Cook and stir until onion has softened and turned translucent, about 5 minutes. Reduce heat to low and continue to cook and stir until onion is very tender and dark brown, about 40 minutes more.
Bring chicken broth to a boil in a large pot; stir in chicken breasts, reduce heat, and simmer until chicken is no longer pink at the center, about 20 minutes. Remove from heat. Remove chicken breasts to a plate using a slotted spoon; reserve broth.
Juice potatoes with an electric juicer; place dry potato flesh into a bowl and discard juice. Stir salt and pepper into potatoes; stir in enough reserved broth to make the mixture the consistency of oatmeal. Set remaining broth aside.
Spread half of potato mixture evenly into the prepared pan. Lay cooked chicken breast evenly over potatoes; scatter caramelized onion evenly over chicken. Spread remaining potato mixture over onions and chicken to cover.
Bake in the preheated oven until golden brown, about 1 hour. Reheat chicken broth; pour over individual servings as desired.
In the old days they used to boil the chicken in water. The chicken was added, with bones and skin, to the pie. You had to strain out the skin pieces and bones from the broth that had fallen off during boiling before serving time. I remember as a kid pulling the bones from my Rappie and placing them in a big bowl on the table. Thank god those days are over. It is an acquired taste and unusual to look at. The top turns a nice golden brown but the potatoes are grey. All my family, even the young ones, love it. My grandmother told me in Nova Scotia they also used to add pork chops to the pie. Great on a cold day. My dad made a potato grater, like I mentioned in the description, and prayed that the potato didn't slip from your hand and scrape the razor sharp teeth he created with the point of a 10 penny nail. In those days the wringing of the potato was the hardest thing to do. Add some mix to the middle of the towel and wring it out over the sink. Now we use a juicer.