Wash the romaine lettuce thoroughly under cold water, chop into bite-sized pieces, and dry thoroughly using a salad spinner or towel.

In a large salad bowl, place the dried chopped romaine, thinly sliced shallots, and grated parmesan cheese. If using lemon zest, add it now. Toss gently to mix.

In a small jar or bowl, combine kosher salt, black pepper, lemon juice, and olive oil. Blend until well combined.

Pour the dressing over the salad and toss until lightly coated. Serve immediately for the best flavor.