Preparation Whisk together vinegar, salt, and pepper in a large bowl, then add oil in a slow stream, whisking until emulsified. Add lettuces and greens and toss to coat. Serve immediately. Cooks' note:Lettuces and greens can be washed and dried 1 day ahead and chilled in sealed plastic bags lined with paper towels.
Preparation Whisk together vinegar, salt, and pepper in a large bowl, then add oil in a slow stream, whisking until emulsified. Add lettuces and greens and toss to coat. Serve immediately. Cooks' note:Lettuces and greens can be washed and dried 1 day ahead and chilled in sealed plastic bags lined with paper towels.