Prep the romaine: Wash romaine hearts thoroughly and spin dry in a salad spinner. Chop into bite-sized pieces and place in a large mixing bowl.
Add olive oil first: Drizzle extra virgin olive oil over chopped romaine and toss to coat each leaf lightly.
Incorporate the parmesan: Sprinkle finely grated Parmigiano-Reggiano over oiled lettuce and toss again until cheese clings to leaves.
Finish with lemon: Squeeze fresh lemon juice over salad and toss one final time. Start with 2 lemons and taste, adding more if desired.
Season and serve: Add flaky sea salt and freshly cracked black pepper to taste. Give one last gentle toss and serve immediately.