Seared Tuna with Niçoise Vegetables and Garlic Butter

Name: Seared Tuna with Niçoise Vegetables and Garlic Butter
Ingredients: 1/4 pound cherry tomatoes on the vine; 3 tablespoons olive oil, plus 2 teaspoons and a drizzle; Salt and pepper; 1/2 pound baby new potatoes; 2 cloves garlic, smashed and peeled; The zest of half a lemon, in strips (made by a vegetable peeler); 1/4 pound haricots verts, trimmed; 1 tablespoon unsalted butter, room temperature; 12 fresh basil leaves, sliced; 1 tablespoon chopped flat leaf parsley; 2 5-ounce fillets of fresh tuna; 1 teaspoon dried herbes de provence