Grilled Tuna with Olive Relish

Ingredients

• Olive Relish:
• 1/2 cup finely chopped fresh parsley
• 1/3 cup chopped pitted imported black olives, such as Kalamata
• 1/4 cup finely chopped celery
• 1 small clove garlic, minced
• 1/2 teaspoon dried oregano
• 1 tablespoon lemon juice
• 1 teaspoon extra-virgin olive oil
• 1/8 teaspoon kosher salt
• Freshly ground pepper, to taste
• 1 3/4 pounds tuna steak, trimmed and cut into 6 portions
• 1 tablespoon extra-virgin olive oil
• 1/4 teaspoon kosher salt
• 3 ounces ground black pepper
• Lemon wedges, for garnish