Begin by boiling water in a large pot. Add the egg noodles and cook according to the package instructions until al dente. Once done, drain the noodles and set them aside.
In a large skillet or wok, heat the vegetable oil over medium-high heat. Add the chopped onion and sauté for about 2-3 minutes, or until the onion becomes translucent. Stir in the minced garlic and grated ginger, cooking for an additional 1 minute until fragrant, ensuring not to burn the garlic.
Push the sautéed onion mixture to one side of the skillet, then add the ground beef to the other side. Cook the beef for 5-7 minutes, breaking it apart with a spatula until it’s browned and fully cooked.
Once the beef is browned, stir in the sliced green bell peppers, broccoli florets, and snap peas. Cook everything together for about 4-5 minutes, stirring occasionally, until the vegetables are tender-crisp.
In a small bowl, whisk together the soy sauce, hoisin sauce, sesame oil, brown sugar, and crushed red pepper flakes (if using). Once combined, pour the sauce over the beef and vegetables in the skillet, stirring well to ensure everything is evenly coated.
Add the drained egg noodles to the skillet, tossing everything together gently. Cook for another 2 minutes, allowing the noodles to heat through and absorb the flavors of the sauce.
Remove the skillet from heat. Taste the mixture and adjust the seasoning by adding more soy sauce if desired for extra flavor.
Notes
Serve in large bowls and garnish with green onions and sesame seeds for added flavor and presentation.