Cut the beef belly and vegetables into bite-sized pieces.
Prepare vegetables such as onion, carrot, zucchini, and mushrooms.
Add a bit of oil to a pan and stir-fry the beef belly.
When the beef belly is about halfway cooked, add the prepared vegetables and stir-fry together.
Add seasonings such as soy sauce, minced garlic, and pepper, then stir-fry.
Cover with a lid and cook over medium-low heat until the vegetables and meat become tender.
Taste and adjust seasoning with salt if needed.
Transfer the finished dish to a plate and serve.