Chop the Romaine into bite-sized pieces and rinse thoroughly under cold water.

In a large salad bowl, combine the chopped lettuce, finely diced shallots, chopped dill, and green onions (if using). Add the feta crumbles and gently toss.

Prepare the dressing by mixing olive oil, lemon juice, salt, and pepper in a jar or bowl. Shake or whisk until emulsified.

Drizzle the dressing over the salad, then toss gently to combine before serving.