01 - Soak the dried rice noodles in warm water according to package instructions until just tender. Drain thoroughly and set aside.
02 - Whisk together soy sauce, oyster sauce, sesame oil, brown sugar, rice vinegar, and chili flakes in a small bowl until sugar dissolves. Set aside.
03 - Heat a large wok or skillet over medium-high heat. Add a splash of oil, then add minced garlic and sliced onion. Stir-fry for 1 minute until fragrant.
04 - Add julienned carrot, sliced bell pepper, and trimmed snap peas to the wok. Stir-fry for 2 to 3 minutes until vegetables are crisp-tender.
05 - Add drained rice noodles and bean sprouts to the wok. Pour the prepared sauce over the ingredients.
06 - Toss everything together vigorously for 2 to 3 minutes using tongs or spatulas until noodles are evenly coated with sauce and heated through.
07 - Remove from heat immediately. Sprinkle with sliced spring onions, chopped cilantro, and toasted sesame seeds. Serve hot with lime wedges on the side.