Grilled Potato Salad with Green Beans, Cherry Tomatoes and Herbs

Ingredients

• 1 pound green wax beans, ends removed, cut diagonally into 2-inch pieces
• 30 mint leaves
• 1/3 cup extra virgin olive oil
• 3 tablespoons white wine vinegar
• Salt and freshly ground black pepper
• 3 cups red and yellow cherry tomatoes, halved
• 2 tablespoons balsamic vinegar
• 1 medium red onion, coarsely diced
• 1/2 cup basil chiffonade