1. Cut the heads of romaine in half, lengthwise. Drizzle the cut faces with olive oil and season with black pepper.
2. Set the charbroiler to high heat and let preheat for 5 minutes.
3. Grill the romaine cut side down, cooking until just charred, about 1 minute. Remove from heat and serve with dressing, cheese, croutons, and a drizzle of fresh squeezed lemon juice.