Best Beef & Broccoli Recipe

Ingredients

• 2 tbsp. dry sherry or shaoxing wine
• 2 tbsp. unseasoned rice vinegar
• 1/2 tsp. kosher salt
• 1/2 tsp. freshly ground black pepper
• 1/3 c. plus 1/4 c. low-sodium soy sauce, divided
• 2 tbsp. plus 1 1/2 tsp. cornstarch, divided
• 2 tbsp. light brown sugar, divided
• 1 1/2 lb. flank or skirt steak, sliced very thin against the grain
• 4 cloves garlic
• 1 (1/2") piece ginger, peeled
• 2 scallions
• 2 small heads broccoli
• 2/3 c. low-sodium beef broth
• 2 tbsp. oyster sauce
• 2 tsp. sriracha (optional)
• 3 tbsp. vegetable oil, divided
• Toasted sesame seeds and white rice, for serving