Chinese Vegetable Stir-Fry - Once Upon a Chef

Ingredients

• 1/3 cup soy sauce
• 3 tablespoons water
• 2 tablespoons dry sherry or Chinese rice wine
• 1 teaspoon sesame oil
• 2 teaspoons sugar
• 1 tablespoon cornstarch
• ¼ teaspoon red pepper flakes
• ¼ teaspoon dry mustard
• 2 tablespoons vegetable oil
• 1 lb broccoli, (cut into 1-in florets (or ¾ lb florets))
• 7 ounces shiitake mushrooms, (stems removed and thinly sliced)
• 1 red bell pepper, (thinly sliced)
• 3 cloves garlic, (finely chopped)
• 3 scallions, (thinly sliced, white/light green and dark green parts separated)
• 1 tablespoon grated fresh ginger ((see note))