1. Cut the potatoes in slices below ¼ inch thick, making sure the portions are even. Next, heat a cast-iron skillet over medium-high heat. Lower the heat to medium when the pan is hot, and add the oil. Let the oil coat the pan evenly.
2. Put the sweet potatoes into the oiled pan, allowing space between the slices. Cover the pan and let the potatoes cook for about 3-4 minutes. Open the pan, flip the pieces, cover, and let it cook for another 3 minutes. They should be done when the cooked sides are fork-tender and golden brown.
3. Set the pan down, and serve the potatoes as you wish. You can eat the recipe as a snack or offer it as a main dish paired with meat, fish, or eggs. You can also provide it as a side dish and garnish it to your preference.

Another quick way to cook potatoes can be found in this video recipe.