Grilled Tuna With Tomato-Basil Vinaigrette
["6 Tbsp. olive oil, divided", "1 Tbsp. balsamic vinegar", "1 Tbsp. finely chopped shallot", "1 clove garlic, minced", "2 Tbsp. finely chopped parsley", "20 finely chopped fresh basil leaves", "1/4 tsp. salt", "freshly ground pepper", "2 large ripe tomatoes, peeled, seeded and chopped", "4 (8 oz.) tuna steaks, 1/2-inch thick"]
["To make vinaigrette, whisk together 4 tablespoons olive oil, vinegar, shallots, garlic, parsley, basil, salt and pepper.", "Add tomatoes and stir.", "For tuna, set grill rack 3 inches above coals. Lightly brush steaks with olive oil and grill for 2 to 3 minutes on each side.", "Arrange tuna on warm plates and spoon vinaigrette over or around them.", "Garnish with basil leaves.", "Serves 4 generously."]
["olive oil", "balsamic vinegar", "shallot", "clove garlic", "parsley", "fresh basil", "salt", "freshly ground pepper", "tomatoes", "tuna"]