Cook the udon noodles according to package instructions. Drain and set aside.

In a wok or large pan, heat a bit of oil over medium heat. Add finely chopped garlic and ginger, sautéing for 1-2 minutes until fragrant.

Add thinly sliced onions to the wok and cook until they become translucent.

Add trimmed and halved green beans to the wok, stirring occasionally until they are tender-crisp.

Pour teriyaki sauce into the wok, stirring to coat the vegetables. Allow the sauce to heat through.

Add the cooked udon noodles to the wok, tossing them in the teriyaki sauce until everything is well combined and heated.

Serve the Teriyaki Noodles hot, garnished with sesame seeds or chopped green onions if desired. Enjoy your delicious and quick teriyaki noodle dish!