First, gather all ingredients and equipment. Prepare a heavy-bottom pan (kawali) and your measuring tools.
Put on kitchen gloves (guwantes) to protect your hands. Clean the pork belly (linisin ang liempo) and cut it into 1-inch cubes (maghiwa ng tig-isang pulgadang piraso). Set aside.
Peel and slice one medium onion into thin pieces (balatan at hiwain ng manipis ang sibuyas). Peel four cloves of garlic and mince them finely (balatan at dikdikin ang apat na butil ng bawang).
Carefully prepare the chilies (maingat na ihanda ang mga sili). Remove the stems from both the Thai chilies and finger chilies (tanggalin ang tangkay ng siling labuyo at siling haba). Mince the Thai chilies and slice the finger chilies into rings. Keep them separate.
Place your pan over medium heat (katamtamang init: 176°C/350°F). Pour in one tablespoon of cooking oil (mantika). Wait for the oil to become hot – you'll see it shimmer slightly.
Add your sliced onions to the hot oil. Cook them while stirring occasionally until they become clear and soft (malinaw at malambot), which takes about 3-4 minutes.
Add the minced garlic to the onions. Stir continuously and cook until you can smell the garlic's aroma (hanggang mabango), about 1 minute. Don't let the garlic brown or it will become bitter (mapait).
Increase the heat to medium-high (190°C/375°F). Add your cubed pork belly to the pan. Cook while stirring occasionally until all sides turn golden brown (hanggang maging golden brown ang lahat ng gilid), about 5-7 minutes.
Lower the heat back to medium (176°C/350°F). Add the fresh shrimp paste (bagoong alamang). Stir well to coat the meat evenly (haluing mabuti para pantay ang pagkakalapat).
Pour in the coconut milk (gata) and water. Stir gently to combine all ingredients (haluing marahan para maghalo ang lahat). Lower the heat to low (mababang init: 149°C/300°F).
Cover the pan and let it simmer gently (pakuluan ng marahan). Cook for 40-45 minutes, stirring occasionally, until the pork becomes tender. You should be able to easily pierce it with a fork (madaling matusok ng tinidor).
Once the pork is tender, add both types of prepared chilies (ilagay ang mga inihanda na sili). Stir gently to incorporate them into the sauce.
Pour in the coconut cream (kakang gata). Reduce heat to very low (napakababang init: 135°C/275°F) and simmer uncovered. Cook for 15-20 minutes, stirring occasionally, until the sauce thickens and you see orange oil floating on top (hanggang lumutang ang pulang mantika sa ibabaw).
Taste the sauce and add salt and pepper as needed (timplahan ng asin at paminta). Let it simmer for 2-3 more minutes to incorporate the seasonings.
Turn off the heat and let the dish rest for 5 minutes before serving. This allows the flavors to settle and the sauce to achieve the perfect consistency (para lalong bumuti ang lasa at tamang lapot ng sarsa).
Serve hot over steaming white rice (mainit na kanin). For the best experience, prepare some fresh cucumber slices (hiwa ng pipino) on the side to help cool your mouth between bites.
Store any leftovers in an airtight container once cooled. This will keep in the refrigerator for up to three days. When reheating, use medium-low heat (149°C/300°F) and stir gently to prevent the coconut milk from separating.