Instructions

  1. Combine olive oil and red wine vinegar in a small bowl; brush oil mixture evenly over 1 side of each bread slice.
  2. Combine tuna, tomatoes, olives, red onion, mayo, capers and pepper in a bowl.
  3. Place 1 lettuce leaf on four of the slices of bread.
  4. Top the lettuce evenly with tuna mixture and cover with the remaining bread slices.