- Preheat your broiler and position a rack about 6 inches below it. 
- Place the halved potatoes in a large pot and cover with cold water. Add the vinegar and a big pinch of salt. 
- Bring to a boil, then lower to a simmer and cook for 8 to 10 minutes, until just fork-tender. 
- Drain the potatoes and let them steam dry for a few minutes. 
- Transfer them to a rimmed baking sheet. Toss with olive oil, salt, and pepper. 
- Arrange them cut side down and broil for 8 to 10 minutes, until crispy and browned. 
- Transfer to a platter and sprinkle with herbs if using. Serve hot or warm.