In a skillet, brown beef over medium heat until fully cooked. Drain off grease, remove from pan to a bowl and set aside.

Add oil to skillet, and cook onion, celery, ginger, garlic, and red pepper flakes together over medium heat until onion is tender.

In a small bowl, whisk beef broth and corn stach together until smooth.

Add hoisin sauce and soy sauce with the onion mixture. Then mix in the cornstarch mixture.

Bring to a boil and boil for 1 minute. Add cooked beef that has been set aside to the skillet along with the cooked pasta. Toss to coat.

Serve each serving sprinkled with green onion. Serves 4.