Heat a large pot to medium high and add the cooking fat.
Saute the onions and garlic, until onions are translucent.
Add the pork, liver, and fish sauce and cook until the pork edges are brown.
Add the potatoes and carrots. Cook for another 3 minutes.
Add the tomato sauce, bay leaves, salt and pepper and enough water to cover the meats. Simmer until potatoes can be poked easily (but not really soft). About 15 minutes.
Add the diced peppers, raisins, and peas and cook for another 5 minutes until peppers are soft.