Place mayonnaise, mustard, Worcestershire, vinegar, onion, garlic, anchovies, chipotle, hot sauce, honey and salt and pepper in a blender and blend until smooth. With the motor running, slowly add the oil and blend until emulsified. Add the Parmesan and blend a few seconds longer.
Heat grill to high.
Brush romaine with oil and season with salt and pepper; place on the grill cut-side down and grill for 30 to 40 seconds or until slightly charred. Arrange lettuce on large platter, drizzle with the dressing and garnish with shaved Parmesan.
Recipe courtesy of The March Family