Tuna Salad with a Twist

Ingredients

• 3 cloves garlic, peeled
• 250 g green beans, halved
• 6 small red potatoes (about 375 g), halved
• 2 tablespoons balsamic or red wine vinegar
• 2 tablespoons low–fat mayonnaise
• 1 tablespoon olive oil
• pinch of salt
• ½ cup (30 g) fresh basil leaves
• 250 g cherry tomatoes, halved
• 1 can (425 g) water–packed tuna, drained
• 6 romaine lettuce leaves
• ⅓ cup (50 g) black olives, for garnish