Clean the tilapia thoroughly and scale it. Pat it dry with paper towels. Season lightly with salt.
Heat cooking oil in a large pan over medium heat. Fry the sweet plantain (saging na saba) until golden brown. Remove and set aside. Fry the potatoes until golden brown. Remove and set aside.
Fry the tilapia until golden brown on both sides, about 3-5 minutes per side. Remove and set aside.
In separate pan, add 2 tablespoon of cooking oil and sauté the garlic until fragrant. Add the onions and cook until translucent. Add the tomatoes and cook until soft. Add the tomato sauce.
Add the green beans and Chinese cabbage stalks. Stir and cook for about 2 minutes. Pour in the water or fish stock and bring to a boil.
Add the cabbage, Chinese cabbage leaves, and pechay. Reduce heat and simmer until the vegetables are tender, about 8 minutes.
Season with salt and pepper to taste. Add the saba bananas and potatoes if using.
Carefully place the fried tilapia into the pot. Simmer for another 5-7 minutes until the vegetables are tender and flavors meld.
Adjust seasoning if needed. Serve the Pocherong Tilapia hot with steamed rice. Enjoy!