In a pan, sauté the garlic and onions.
Add the pork, liver, and bell pepper, and stir for a minute.
Add vinegar, pouring from the side of the pan, and bring to a boil without stirring. Lower heat and simmer until most of the liquid's evaporated.
Add just enough water to cover the meat.
Cover and simmer for 30 minutes or until the pork become tender.
Add potatoes and carrots. Mix well and cook until vegetables become tender.
Add salt and patis to taste.
Finally, add the sweet peas. Mix well.
Cook for at least 1 minute.
Serve while hot.