We treat arugula like lettuce and use it in similar ways ... The best flavor comes from fresh, firm leaves, which can remain like that for a long time if you take proper care of them.
Arugula also makes a great addition to a sandwich ... the experts at Hitchcock Farms have some solid advice on how to keep lettuce fresh for longer, namely relying on the crisper drawer set ...
3 cups arugula or butterhead lettuce (Bibb or Boston leaves), or another tender ... 1 1/2 tablespoons chopped shallot or onion, 2 tablespoons fresh lemon juice, 1/4 teaspoon salt, and a good dash ...