Begin by cooking the udon noodles according to the package instructions. Once cooked, drain and set them aside.
In a large wok or a skillet, heat the vegetable oil over medium-high heat.
Add the minced garlic and ginger to the pan, sautéing for about 30 seconds until fragrant.
Toss in the sliced bell peppers, broccoli florets, and snap peas. Stir-fry the vegetables for about 4-5 minutes, or until they are tender-crisp.
Add the cooked udon noodles to the wok, along with the soy sauce, chili paste, and sesame oil. Stir everything together, ensuring the noodles are well coated with sauce and the vegetables are evenly distributed.
Cook for an additional 3-4 minutes, allowing the noodles to slightly crisp up at the bottom if desired.
Finally, fold in the chopped green onions and give everything a good mix, allowing the flavors to meld for another minute.
Remove from heat, then plate the stir fry and garnish with sesame seeds and fresh cilantro leaves.
Notes
Adjust the chili paste according to your spice preference.