Boil the Hakka noodles according to the package instructions and drain well.
Heat oil in a wok or large pan.
Add chopped garlic and stir-fry for a few seconds.
Add sliced vegetables and cook on high heat for 2–3 minutes.
Add cooked noodles, soy sauce, vinegar, salt and black pepper.
Toss everything together on high heat until well combined.
Serve hot.