Main-Dish Mediterranean Salad - DSM

Ingredients

• 1 package (10 ounces) ready-to-use chopped romaine lettuce
• 1/2 pound fresh green beans, cooked and drained <i>or</i> 1 can (about 14 ounces) whole green beans, drained
• 1 package (5 1/2 ounces) solid white tuna, flaked
• 8 ounces cherry tomatoes, halved
• 2 tablespoons olive oil
• 2 tablespoons cider vinegar or white vinegar
• 1 1/2 teaspoons Dijon mustard
• 1/2 teaspoon black pepper