4 teaspoons olive oil |
4 teaspoons red wine vinegar |
8 slices whole-grain bread |
2 (6-ounce) cans low-sodium tuna in water, drained and flaked |
1/3 cup roughly chopped drained oil-packed sun-dried tomato halves |
1/4 cup sliced ripe olives |
1/4 cup finely chopped red onion |
3 tablespoons low-fat mayonnaise |
2 teaspoons capers |
1/4 teaspoon freshly ground black pepper |
4 romaine lettuce leaves |
