Braised Cod with Tomatoes and Leeks

Name: Braised Cod with Tomatoes and Leeks
Ingredients: 4 skinless cod fillets (about 5 to 6 ounces each), 1-1½ inches thick*; Kosher salt and pepper; 2 tablespoons olive oil; 1 pound leeks (or 2 medium), white and light green parts only, halved lengthwise, washed and thinly sliced; 3-4 garlic cloves, minced; 12 ounces (1 pint) cherry or grape tomatoes, halved; ½ cup dry white wine**; 1 tablespoon butter; Optional: lemon wedges for serving, a sprinkle of fresh herbs like basil, parsley and/or thyme