Begin by boiling the chow mein noodles according to the package instructions, typically for about 3-4 minutes. Drain and set aside, ensuring they're not sticky.

In a large skillet or wok, heat 1 tablespoon of vegetable oil over medium-high heat until it shimmers, perfect for stir-frying.

Add the sliced onion, chopped celery, and shredded cabbage to the pan. Stir-fry for 3-4 minutes until the vegetables are tender yet still crisp, showcasing vibrant colors.

Incorporate the minced garlic into the stir-fried veggies and cook for about 30 seconds, until fragrant and golden.

Add the drained chow mein noodles to the skillet. Pour in the soy sauce, oyster sauce, hoisin sauce (if using), brown sugar, and sesame oil. Toss everything to combine well.

Stir-fry for an additional 2-3 minutes, ensuring all ingredients are well-integrated and heated through.

Taste, then season with salt and pepper as necessary before serving hot.