Preparation Cook greens in a 6- to 8-quart pot of , uncovered, until wilted and tender, about 3 minutes. Drain greens in a colander, then immediately plunge into a large bowl of very cold water to stop cooking. Once cooled, drain in colander, tossing occasionally, 1 hour. Just before serving, whisk together vinegar, salt, and oil in a bowl until combined well. Add greens and toss to coat. Cooks' note:Greens can be cooked and drained (but not dressed) 1 day ahead and chilled, covered. Bring to room temperature before proceeding.
Preparation Cook greens in a 6- to 8-quart pot of , uncovered, until wilted and tender, about 3 minutes. Drain greens in a colander, then immediately plunge into a large bowl of very cold water to stop cooking. Once cooled, drain in colander, tossing occasionally, 1 hour. Just before serving, whisk together vinegar, salt, and oil in a bowl until combined well. Add greens and toss to coat. Cooks' note:Greens can be cooked and drained (but not dressed) 1 day ahead and chilled, covered. Bring to room temperature before proceeding.