3 tablespoons lime juice
2 tablespoons minced shallot
1/2 cup fruity extra-virgin olive oil
1/2 teaspoon kosher salt
1/4 teaspoon pepper
In a small bowl, whisk together shrub and lime juice. Stir in shallot. Vigorously whisk in oil in a stream. Whisk in salt and pepper. Taste with a piece of lettuce; add more lime juice, salt, and pepper as needed.
Make ahead: Up to 1 week, chilled.