Recipe: <!-- -->Grilled Tuna Niçoise Salad<!-- -->

Ingredients

• 2 tablespoons champagne vinegar
• 1 tablespoon chopped fresh tarragon
• 1 teaspoon Dijon mustard
• 1 small shallot, finely chopped
• 1/2 teaspoon fine sea salt
• 1/4 teaspoon ground black pepper
• 1/4 cup extra-virgin olive oil
• 1 (1-pound) fresh, or frozen and thawed, tuna steak
• Olive spray oil
• 1 1/2 pounds small new potatoes, boiled or steamed until tender and cooled
• 1/2 pound green beans, trimmed and boiled or steamed until tender and cooled
• 1 cup halved cherry tomatoes
• 1/2 cup pitted Niçoise olives
• 1/2 cup thinly sliced red onion
• 1 hard-boiled egg, peeled and cut into wedges