Heat pan on medium-high, add oil and butter. When the fat is heated add minced onion, cook until soft, add shredded potato and salt and pepper, stir, and mix up. Then start pressing the mixture down and toward the center of the pan. Try to get it to congeal and keep pressing it down and cook for 10 to 12 minutes while occasionally lifting the mixture so it doesn't stick. When I took the meat out I took the juices that had collected and poured them on top of the potato mixture and fried the top with the scalding oil -- it was amazing. Cut into two or more pieces.