Make the sauce. In a small sauce pan, stir together the broth, soy sauce, sugar, pepper and starch. Cook, stirring often, until thick and no longer cloudy. Set aside.
Heat the cooking oil in a wok. Add the carrot, bell pepper, cauliflower and onion. Sprinkle with a little salt and sugar. Stir fry for about a minute. Add the garlic and stir fry for another half a minute.
Add the noodles to the vegetables, stir and toss until the noodles are glistening with oil.
Add the roast pork belly, pour in the oyster sauce and the previously prepared sauce. Stir and toss just until everything is heated through.
Drizzle in the sesame seed oil, toss a few more times and serve at once.