Preheat the oven to 425°. Line a baking sheet with baking parchment. Cut the potatoes in half lengthways, then cut the pieces into halves or quarters, depending on size. On the prepared baking sheet, toss the potatoes with the oil and ¼ teaspoon of salt. Roast for 15 minutes, then stir. Continue to roast the potatoes until they are tender, about 5 minutes. Remove the potatoes from the oven and transfer to a cutting board; let sit until cool enough to handle, then cut into bite-sized pieces.