Beef & Broccoli

Name: Beef & Broccoli
Cuisine: Asian, Chinese
Ingredients: 1 1/2 lb. flank steak sliced thinly against the grain; 1 1/2 tsp. cornstarch; 1 tsp kosher salt; 1 tbsp. Worcestershire sauce; 1 cup beef broth; 1/4 cup low sodium soy sauce; 1 tsp. sesame oil; 1/2 tsp. crush rushed pepper; 1/2 tsp. ground ginger; 1 tsp. sugar; 1 tbsp. minced garlic; 1 tsp. onion powder; 1 1/2 tsp. cornstarch; 3 cups broccoli florets; 2 tbsp. grapeseed oil; 2 tbsp. unsalted butter; sesame seeds for garnish optional