Tuna Sub-in-a-Tub

Bahan-bahan (2 porsi)

• 5 ounce can light tuna ( in water, drained)
• ¼ cup celery (chopped )
• ¼ cup red onion (chopped)
• ¼ cup broccoli florets (chopped)
• 3 tablespoons mayonnaise (I like Hellmann's )
• 1 teaspoon red wine vinegar
• 3 cups shredded lettuce (such as Romaine or Butter)
• 1 vine ripe tomato (sliced)
• ½ cup banana peppers (or pepperoncini, drained (or more to taste))
• red onion (a few thin slices )
• 8 slices dill pickles (optional)
• 1 teaspoon olive oil
• 1 teaspoon red wine vinegar (or more to taste )
• dried oregano, to taste