In a medium bowl, whisk together ¼ cup of extra virgin olive oil, the juice and zest of one lemon, 1 tablespoon of honey, and a generous pinch of salt and pepper until emulsified.

In a large salad bowl, combine 4 cups of chopped Romaine lettuce, ½ cup of grated Parmesan cheese, and ¼ of a thinly sliced red onion. Add crushed red pepper flakes if desired.

Drizzle the lemon dressing over the salad mixture and toss gently until all ingredients are coated.

Serve the salad immediately, optionally adding extra Parmesan and crushed red pepper flakes for garnish.