Tomato and Pepper Salad, Cádiz Style

In a medium-sized mixing bowl, combine the diced tomatoes, chopped green bell peppers, sliced red onion, and tuna chunks.

In a separate small bowl, whisk together the extra-virgin olive oil, vinegar, salt, and black pepper to make the dressing.

Gently fold the dressing into the tomato, pepper, onion, and tuna mixture until well coated.

Cover the bowl and refrigerate the salad for at least 2 hours to allow the flavors to meld together.