Cook the udon noodles according to package instructions. Once cooked, drain and set aside, tossing them lightly with a bit of oil to prevent sticking.
In a large skillet or wok, heat the vegetable oil over medium heat. Add the minced garlic and grated ginger, sautéing for about 1 minute until fragrant.
Toss in the sliced bell pepper, snap peas, and julienned carrot. Stir-fry the vegetables for about 3-4 minutes until they are tender-crisp.
Add the cooked udon noodles to the skillet/wok, followed by the soy sauce, chili paste, and sesame oil. Stir well to combine all ingredients and ensure the noodles are evenly coated.
Stir-fry for another 2-3 minutes until everything is heated through. Remove from heat and sprinkle with chopped green onions and sesame seeds. Garnish with fresh cilantro if desired.
Notes
Adjust the chili paste for your desired spice level.