Preheat a grill to medium-high.
Rinse and pat dry the lettuce. Cut the 2 heads in half lengthwise. Brush surface with olive oil and grill about 4 to 5 minutes total, turning occasionally. Place each wedge on a salad plate and drizzle with Citrus Caesar Vinaigrette or your favorite Caesar dressing. With a vegetable peeler, shave some pieces from a wedge of Parmigiano-Reggiano over each salad and serve.
Place all ingredients in a pint jar with a lid. Secure the lid, then shake to blend. Store, covered, in the refrigerator for up to a week.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.
Recipe courtesy Karen Adler and Judith Fertig, adapted from BBQ Queens Big Book of Barbecue, published by Harvard Common Press, 2005