Lyonnaise Potatoes

• ¼ cup unsaturated oil of your choice
• 2 cups ⅛-inch-thick boiled potato slices</

Heat the oil in a large skillet over medium-high heat. Add the potatoes and sauté until golden on both sides. At the same time melt the butter in a smaller skillet over medium heat. Add the onions and sauté until golden. Add the vinegar and a little salt and pepper to the onions only. Drain the cooked potatoes on paper towels, then toss the onions and potatoes together. Serve immediately, sprin