Prepare the Pork: In a large pot, heat the cooking oil over medium heat. Add the pork belly chunks and cook until they are browned on all sides.
Sauté Aromatics: Add the sliced onion and minced garlic to the pot. Sauté until the onion becomes translucent and the garlic is fragrant.
Simmer Pork: Pour in the water and add the fish sauce and whole peppercorns. Bring to a boil, then reduce the heat to low and let it simmer for about 45 minutes or until the pork is tender.
Add Potatoes and Saba: Once the pork is tender, add the potatoes and saba banana pieces. Continue to simmer for 15 minutes until the potatoes are tender.
Incorporate Cabbage: Add the cabbage quarters and cook for another 10 minutes until the cabbage is tender but not mushy.
Season and Serve: Taste the broth and season with salt as needed. Serve hot with steamed rice.
For a richer broth, you can substitute some of the water with pork broth or add a pork bouillon cube.
Serve Pork Pochero with a side of steamed rice. A dipping sauce of fish sauce with calamansi (Philippine lime) can enhance the flavors.