Preparation Cover potatoes generously with cold salted water (1 tablespoon salt for 3 quarts water) in a pot and simmer until potatoes are tender, about 30 minutes. Drain potatoes. When potatoes are cool enough to handle but still warm, peel and cut into 1-inch pieces, then toss with vinegar and 1/2 teaspoon salt in a large bowl. Cook bacon in oil in a large heavy skillet over medium-low heat, turning occasionally, until crisp. Drain bacon on paper towels, reserving fat in skillet. Add 1/4 cup of hot bacon fat to potatoes and toss. Coarsely crumble bacon on top, then add chives and salt and pepper to taste and toss.
Preparation Cover potatoes generously with cold salted water (1 tablespoon salt for 3 quarts water) in a pot and simmer until potatoes are tender, about 30 minutes. Drain potatoes. When potatoes are cool enough to handle but still warm, peel and cut into 1-inch pieces, then toss with vinegar and 1/2 teaspoon salt in a large bowl. Cook bacon in oil in a large heavy skillet over medium-low heat, turning occasionally, until crisp. Drain bacon on paper towels, reserving fat in skillet. Add 1/4 cup of hot bacon fat to potatoes and toss. Coarsely crumble bacon on top, then add chives and salt and pepper to taste and toss.