Pork Stir-Fry with Black Bean Sauce

Name: Pork Stir-Fry with Black Bean Sauce
Cuisine: Asian, Chinese
Ingredients: 2 Tbsp canola oil, divided; boneless pork leg or loin, cut into strips; 1 large carrot, thinly sliced diagonally; 1 red pepper, cut into strips; 1 yellow pepper, cut into strips; 2 celery stalks, cut into strips; 1 onion, cut into wedges; 2 cloves garlic, chopped; 1 Tbsp fresh ginger, chopped; 2 Tbsp black bean sauce; 2 1/2 cups low-sodium chicken stock; 1/4 tsp pepper; 2 1/2 Tbsp cornstarch; 2 Tbsp cooking wine or dry sherry; reen onions, chopped