Cook the pancit canton noodles according to package instructions until "al dente" (firm to the bite). Drain and set aside.
In a large pan or wok, heat the cooking oil over medium-high heat. Stir-fry the thinly sliced pork belly until lightly browned and crispy. Remove from the pan and set aside.
In the same pan, sauté the minced garlic and sliced onion until fragrant and translucent. Add the julienned carrot, shredded cabbage, and sliced green beans. Stir-fry for a few minutes until the vegetables are slightly tender but still crisp.
Make the Sauce: In a small bowl, mix together the soy sauce, oyster sauce, fish sauce, and brown sugar. Pour the sauce mixture into the pan with the sautéed vegetables.
Combine Noodles and Sauce: Add the cooked pancit canton noodles to the pan, tossing them with the sauce and vegetables until well coated. Pour in the chicken broth or water gradually, stirring continuously, until the noodles have absorbed the liquid and are fully cooked.
Add Meat: Return the cooked pork belly to the pan, tossing them with the noodles and vegetables until evenly distributed. Cook for a few more minutes until everything is heated through.
Season to Taste: Taste the Pancit Canton and season with salt and pepper as needed. Adjust the seasoning according to your preference.
Serve hot with calamansi or lemon wedges on the side for squeezing over the noodles, if desired.
Leftover Pancit Canton can be stored in an airtight container in the refrigerator for up to 3 days. Reheat gently on the stove or in the microwave before serving.
Feel free to customize your Pancit Canton with additional ingredients such as shrimp, Chinese sausage (chorizo), bell peppers, or snow peas. You can also garnish with chopped green onions or fried garlic for extra flavor and presentation.