Gather all your ingredients. Heat up a large pot of water. Prepare the veggies and seafood that will go with the noodles. Set aside.
When the water is boiling, put in a pinch of salt. Add in the prepared zucchini, carrots and red pepper, then plunge in boiling water quickly for remove from heat after 30 seconds. Next, blanch the scallops quickly for 30 seconds, or until they turn opaque. Repeat with the shrimp and blanch till the shrimp turn pink, 1-2 minutes. Remove from heat, drain and set aside. With the same water, pre-cook the noodles per instructions on package. Test the noodles - they should taste closer to the uncooked side of al dente pasta. Drain and set aside. Next, prepare the seasoning. Mix the sugar and salt with 1 tablespoon of hot water. Then add in the rest of the seasoning - soy sauce, dark soy sauce, oyster sauce, sesame oil, and white pepper. Stir until combined.
Heat the wok or pan, spread 2 tablespoons of oil around the perimeter and heat till smoking. Quickly add in the mushrooms and stir fry for 30 seconds. Then, add in the rest of the veggies except the green scallions. Add 1-2 tablespoons of oil if it looks too dry. Stir for another 2 minutes until the veggies have softened.
Add the still warm well-drained precooked noodles and stir fry everything for another minute until everything is well mixed and warmed up.
Drizzle the prepared seasoning all over the noodles and veggies and stir-fry everything together for 1 minute, or until the soy sauce mixture is distributed evenly.
Mix gently so you don’t break up the noodles. Add more oil around the perimeter of the pan if the noodles are sticking to the bottom of the pan. If the noodles are too dry, add a bit of water to loosen it up.
Finally, add in the green scallions and mix until the noodles are heated through, another 3-4 minutes. Top with shrimp and scallop then serve immediately!