Prepare the Noodles. Bring a pot of salted water to a boil and cook the noodles according to package directions until tender but still firm (al dente). Drain and rinse under cool water to stop the cooking process. Toss with a drizzle of sesame oil to prevent sticking and set aside.

Cook the Ground Beef. Heat the vegetable oil in a large skillet or wok over medium-high heat. Add the ground beef and cook, breaking it apart with a spatula. Continue cooking for about 5–7 minutes, or until the beef is browned and no longer pink. Drain excess fat if necessary.

Prepare the Sauce. In a small bowl, whisk together the soy sauce, hoisin sauce, sesame oil, minced garlic, and grated ginger. This sauce forms the savory, umami-packed base that ties the whole dish together.

Stir-Fry the Vegetables (Optional). If using vegetables, add them to the skillet with the cooked beef. Stir-fry for 2–3 minutes, just until they start to soften but still retain a slight crunch. Avoid overcooking, as you want them to add texture to the dish.

Combine Everything. Add the cooked noodles to the skillet with the beef and veggies. Pour the sauce over the mixture and use tongs or a wooden spoon to toss everything together until evenly coated. Let it cook for another 2–3 minutes, allowing the flavors to meld beautifully.

Taste and Serve. Give the noodles a final toss, taste, and adjust seasoning if needed. For a touch of spice, drizzle in some sriracha or sprinkle red pepper flakes. Garnish with chopped green onions, sesame seeds, or cilantro before serving.