I started by whisking the cornflour and dark soy sauce until smooth, then added the rest of the sauce ingredients. Next, I tossed about 2 tsp of the sauce with the chicken slices to coat them.
I heated the oil in my wok until it was just starting to smoke. Then I added the onion and garlic for about 30 seconds, followed by the chicken. I stirred for about a minute until the outside was white but still slightly raw inside.
Next, I tossed in the carrots and sliced bell pepper, cooking them for about 2 minutes or until the chicken was fully cooked. The veggies stayed crisp-tender, which is exactly what I like.
Then I added the cooked/prepared noodles, poured in the remaining sauce and the ¼ cup water, and used two spoons to toss everything for around 30 seconds. This makes sure the sauce coats every strand.
Finally, I folded in the green onion pieces, tossed for another minute until the noodles were glossy and slick with sauce, and served immediately with some extra green onion on top.