Creating Mongolian Ground Beef Noodles is a straightforward process, and following these steps will help you achieve delicious results:

1. Cook the Noodles: In a large pot, boil water and cook the egg noodles according to the package instructions. Drain and set aside.
2. Brown the Beef: In a large skillet or wok, heat vegetable oil over medium-high heat. Add the ground beef and cook until browned and cooked through, about 5-7 minutes. Break it apart with a spatula.
3. Add Aromatics: Stir in the minced garlic and ginger. Cook for an additional 1-2 minutes until fragrant.
4. Incorporate Vegetables: Add the mixed vegetables to the skillet. Sauté for about 3-4 minutes until they are tender but still crisp.
5. Make the Sauce: In a small bowl, mix together the soy sauce, oyster sauce, sesame oil, cornstarch, and beef broth. Stir until the cornstarch is dissolved.
6. Combine Everything: Pour the sauce mixture over the beef and vegetables in the skillet. Cook for another 2-3 minutes, stirring frequently, until the sauce thickens.
7. Add Noodles: Add the cooked egg noodles to the skillet. Toss everything together until the noodles are well coated in the sauce.
8. Season: Taste and adjust the seasoning with salt and pepper as needed.
9. Serve: Remove from heat and garnish with sliced green onions.

These steps will guide you in crafting a delicious plate of Mongolian Ground Beef Noodles that is sure to impress everyone at the table.