Prepare the Vegetables

Boil water in a pot, add a pinch of salt, and cook the wheat noodles according to the package instructions. Drain and set aside.

Cook the Noodles

In a large skillet or wok, heat the vegetable oil over medium heat. Add the minced garlic and sauté until fragrant.

Add the chopped onion, zucchini, and cabbage to the skillet. Stir-fry for about 3-4 minutes until the vegetables are slightly softened.

Stir in the black bean paste, soy sauce, and sugar. Mix well to combine with the vegetables.

Pour in the water and bring the mixture to a simmer. Let it cook for about 5 minutes until the sauce thickens slightly.

Add the cooked noodles to the skillet and toss them in the sauce until they are well coated. Season with salt and pepper to taste.

Serve the Jajangmyeon hot, garnished with additional chopped vegetables if desired.