Cook the noodles according to package instructions until al dente. Drain and set aside, reserving a bit of the pasta water.
In a large skillet over medium heat, add the sesame oil. Once hot, add the minced garlic and grated ginger, sautéing for about 30 seconds until fragrant.
Add the mixed vegetables to the skillet and stir-fry for 3-4 minutes until they are tender but still crisp.
In a small bowl, whisk together the gochujang, soy sauce, honey (or maple syrup), and a splash of the reserved pasta water to create a sauce.
Add the cooked noodles to the skillet with the vegetables and pour the sauce over the top. Toss everything together until the noodles are well coated and heated through. Season with salt and pepper to taste.
Serve hot, garnished with sliced green onions and sesame seeds if desired.