Here's a grilled romaine Caesar that we make.
Grilled Caesar
1 tablespoon lemon juice
1 garlic clove, peeled, minced
½ cup mayonnaise
¼ cup grated Parmesan cheese
1 tablespoon white wine vinegar
1 tablespoon Worcestershire sauce
1 tablespoon Dijon mustard
2 anchovy fillets, rinsed
½ teaspoon salt
½ teaspoon pepper
¼ cup olive oil
3 romaine lettuce hearts (18 ounces), rinsed, patted dry, halved lengthwise through cores
Directions
Prepare a charcoal grill or preheat a gas grill to medium-high heat.
To prepare the dressing: Combine lemon juice and garlic in bowl, and let stand for 10 minutes. In a blender or food processor, place the mayonnaise, Parmesan, lemon-garlic mixture, vinegar, Worcestershire sauce, mustard, anchovies, salt and pepper. Blend or process for about 30 seconds. With blender running, slowly add oil. Reserve 6 tablespoons dressing for brushing romaine.
When the grill is ready, oil the grate, and cover grill for about 5 minutes.
Brush cut sides of romaine with reserved dressing; place romaine, cut side down, on grill over direct heat. Grill, uncovered, until lightly charred, 1 to 2 minutes. Drizzle romaine with remaining dressing. Sprinkle with Parmesan and serve.