Soak the sweet potato noodles in warm water for about 20 minutes until they become soft.
In a large pan or wok, add a bit of sesame oil and cook the ground beef over medium heat until browned and cooked through. Season with salt and pepper to taste. Remove from the pan and set aside.
In the same pan, add a bit more sesame oil and sauté the minced garlic until fragrant. Add in the thinly sliced vegetables and stir fry until they are cooked to your preferred doneness.
While the vegetables are cooking, drain the noodles and cut them into shorter lengths for easier eating. Add the noodles to the boiling water and cook according to package instructions until they are soft but still chewy. Once cooked, drain them well.
Return the cooked ground beef to the pan with the vegetables. Add in the cooked and drained noodles, soy sauce, and sugar. Stir everything together until well mixed and heated through.
Drizzle with the remaining sesame oil, and adjust the seasoning with more soy sauce or salt, if needed.
Garnish with sesame seeds and sliced green onions before serving.
