Soak the noodles in boiling water for 5-10 minutes until softened, then drain and rinse under cold water to stop the cooking process. If using fresh noodles, simply separate them and set aside.
In a small bowl, mix all the ingredients for the drunken noodle sauce and set aside.
Heat the oil in a wok or large pan over high heat. Add the finely chopped garlic and chillies, stir-frying until fragrant, about 30 seconds. Toss in the sliced onion and cook for an additional minute. Add the chicken and fish sauce, stir-frying until the chicken is cooked through, around 2 minutes. Next, add the carrot and Chinese broccoli, cooking until they begin to soften. Throw in the spring onions and noodles, pouring over the drunken noodle sauce. Stir-fry everything together until well combined, cooking for another 1-2 minutes. Turn off the heat, add the Thai basil leaves, and toss until just wilted. Serve immediately and enjoy!
