Cook the udon noodles according to the package directions, then drain and rinse them under cold water to stop the cooking process and prevent sticking.
1 package Udon noodles
In a small bowl, mix the soy sauce, water, hoisin or oyster sauce, minced garlic, minced ginger, sugar, and cornstarch until well combined. Set aside.
¼ cup soy sauce, ¼ cup water, ¼ cup hoisin or Oyster sauce, 2 garlic cloves, 2 tablespoons ginger, 1 tablespoon sugar, 1 tablespoon cornstarch
Heat a wok or large skillet over medium-high heat and add sesame oil. Once hot, add the sliced green onions, red bell pepper, green beans, and carrots. Stir-fry for about five minutes, tossing frequently, until the vegetables are slightly softened but still crisp.
2 tablespoons sesame oil, 2 green onions, ½ red bell pepper, 1 cup green beans, 1 carrot
Add the cooked noodles to the wok along with the prepared sauce. Toss everything together, ensuring the noodles are evenly coated. Cook for another five minutes, stirring frequently, until the sauce thickens and clings to the noodles.
Remove from heat and transfer to serving bowls. Sprinkle with sesame seeds and serve immediately.
Sesame seeds