Tuna Salad-Stuffed Tomatoes with Arugula

Whisk oil, vinegar, salt and pepper in a medium bowl. Transfer 3 tablespoons of the dressing to a large bowl and set aside.

Slice enough off the top of each tomato to remove the core (1/2 to 1 inch). Chop enough of the tops to equal 1/2 cup and add to the medium bowl. Scoop out the tomato pulp using a teaspoon or melon baller. (Discard the pulp or save for another use.)

Add tuna, celery, onion, olives and thyme to the medium bowl; gently toss to combine. Fill the hollowed tomatoes with the tuna mixture.

Add beans and arugula to the dressing in the large bowl and toss to combine. Divide the salad among 4 plates and top each with a stuffed tomato.