Black-Bean Shrimp with Chinese Broccoli

INGREDIENTS

• 1 1/2 lb large shrimp in shell (21 to 25 per lb), peeled and deveined
• 2 teaspoons cornstarch
• 1/4 teaspoon salt
• 1 (1-inch) piece fresh ginger, peeled and cut into very thin matchsticks
• 1 1/2 lb (Chinese broccoli)
• 2 garlic cloves, minced
• 1/2 fresh jalapeño chile (including seeds), or to taste, cut crosswise into 1/8-inch-thick slices
• 2 tablespoons fermented black beans, rinsed and chopped
• 1 tablespoon peanut or vegetable oil
• 3 tablespoons Chinese rice wine (preferably Shaoxing) or medium-dry Sherry
• 1 teaspoon sugar
• 3 teaspoons light soy sauce (preferably Pearl River Bridge brand)
• 3/4 cup homemade chicken broth (reserved from ) or store-bought chicken broth (reduced-sodium if canned)
• 1 teaspoon Asian sesame oil