Preheat your oven to 400 degrees.
In a large pot, boil enough water to cover your potatoes. Add in vinegar and salt.
Put the sliced potatoes into water and simmer for about 15 minutes or until potatoes begin to get tender.
Drain the potatoes, pat dry, and let sit on a towel or paper towel for 5 minutes to dry off.
When potatoes are dry, toss them with the oil, lay them out on a baking sheet and sprinkle with sea salt.
Roast at 400 F for about 10 minutes, flipping halfway through, or until potatoes begin to get golden brown and crisp around the edges!