Home Fries

1/3 cup cooking oil
2-3 pounds potatoes, scrubbed and thinly sliced

Salt and pepper, to taste
2-3 onions, thinly sliced

Heat oil in a heavy 10-inch skillet, preferably cast iron, over medium-high heat. Add potatoes, sprinkling layers generously with salt and pepper.  Brown bottom layer of potatoes and turn bottom potatoes to the top. When potatoes on bottom start to brown, work middle potatoes toward the bottom.  This will take about 15 minutes.  Distribute onions evenly throughout potatoes.  Cover skillet, lower heat, and cook until potatoes are tender, 15 to 20 minutes. Scrape crisp parts from the skillet when serving.