The combination of balsamic, raspberry and red wine vinegars in the dressing adds a distinctive note to this otherwise simple vinaigrette. Terrific Green Salads
In a salad bowl, combine the mustard with the 3 vinegars. Whisk in the olive oil and season with salt and pepper. Add the Boston lettuce and radicchio; toss to coat. Mound the salad on plates, top with the Parmesan shavings and serve.