Cook the Noodles: Boil the linguine according to package instructions. Drain and set aside.
Brown the Beef: Heat a large skillet over medium heat. Add the ground beef and cook until browned, breaking it into crumbles. Drain any excess grease.
Add Garlic: Stir in minced garlic and cook for 1–2 minutes until fragrant.
Prepare the Sauce: In a small bowl, whisk together soy sauce, hoisin sauce, beef broth, brown sugar, ground ginger, and black pepper. Pour the sauce into the skillet with the beef.
Thicken the Sauce: Combine cornstarch and water in a small bowl to form a slurry. Gradually add the slurry to the skillet, stirring constantly, until the sauce thickens.
Combine with Noodles: Add the cooked linguine to the skillet. Toss until the noodles are evenly coated in the sauce.
Garnish and Serve: Top with sliced green onions and, if desired, red pepper flakes for a touch of heat. Serve hot and enjoy!