Cook the noodles. Bring a large pot of water to a boil and then boil the noodles for 2 minutes. Drain and set aside.
Prepare the lobster. For live lobsters, release the urine from the lobster by taking a chopstick and puncturing the underside of the lobster's tail where there is an opening. The opening is near the tip of the tail. Kill the lobster by splitting the head vertically with a knife. Then trim off the legs, remove the tail, and cut off the claws. Slice the tails in half or into 2-inch pieces. Cut the claws in half. Dry with paper towels.
Coat the lobster. In a large mixing bowl, add the cornstarch, salt, and white pepper and mix until combined. Then, thinly coat the lobster meat and shake off any excess.
Mix the sauce. In a small mixing bowl, add the oyster sauce, soy sauce, sugar, chicken bouillon powder, white pepper, and Shaoxing wine.
Fry the lobster. Add 1 cup of oil to your wok or large skillet over high heat. Heat the oil until it reaches about 350–375°F. Working in batches to not crowd the pan, fry the lobster pieces for about 40-50 seconds or until the shell turns bright red and the meat turns white and opaque. Using a spider strainer, remove the lobster pieces and let any excess oil drip off. Then, remove the oil and reserve it on the side.
Stir Fry. In the same wok, add 1 tablespoon of the remaining lobster oil over medium-high heat. Saute the garlic, ginger, and white green onions pieces until fragrant about 30 seconds-1 minute. Add the lobster back into the wok and stir fry for 30 seconds.
Add the sauce. Then add the hot water and sauce mixture and gently stir until everything is mixed thoroughly. Cover the wok and bring the sauce to a boil, then reduce to medium heat to simmer for 4-5 minutes or until slightly reduced.
Add cornstarch slurry. In a small bowl, mix together the 2 teaspoons of cornstarch and 1 tablespoon of water until combined. Then add the cornstarch slurry to the sauce. Mix until the sauce thickens.
Finish. Add the remaining green onion pieces and cook until just wilted. Then turn off the heat, add sesame oil, and mix to combine. Pour the lobster stir fry over the noodles and enjoy!