Glazed Black Cod with Bok Choy and Scallions

Name: Glazed Black Cod with Bok Choy and Scallions
Ingredients: 1 1/2 teaspoons Szechuan peppercorns; 6 tablespoons lower-sodium soy sauce; 1/4 cup honey; 6 garlic cloves, minced (about 2 tablespoons); 2 pieces fresh ginger, peeled and finely chopped (about 2 tablespoons); 2 tablespoons rice wine vinegar; 1 1/2 tablespoons toasted sesame seeds; 1 tablespoon hot chile oil (such as Foreway); 2 (1- pound) skinless wild Alaskan black cod fillets (about 1 inch thick), pin bones removed; 6 heads baby bok choy, halved lengthwise or quartered if large (about 1 1/4 pounds); 12 medium scallions, halved crosswise; 2 tablespoons canola oil