Grilled Tuna Nicoise Salad - Restaurant Association of Nova Scotia

Ingredients

• 1/3 cup balsamic vinegar
• 1/4 cup olive oil
• 1 tablespoon Dijon-style mustard
• 1/2 teaspoon bottled minced garlic
• 1 pound fresh tuna steaks, cut 1-inch thick
• 1-1/2 pounds red-skinned potatoes, cut into 1/4-inch slices
• 8 ounces green beans, trimmed
• 2 tablespoons olive oil
• 6 cups sliced romaine lettuce
• 1 cup cherry tomatoes, halved
• 1/2 cup pitted kalamata olives
• 1/4 cup thinly sliced red onion
• 2 hard-cooked eggs, cut into wedges
• 2 teaspoons snipped fresh tarragon