Slice the fish as needed. Sprinkle salt all over the fish slices and then rub all over. Let it stay for at least 15 minutes.
Heat oil in a pan. Fry the fish slices until golden brown. Turn it over and perform the same step on the opposite side. Remove fish from the pan. Place in a clean plate. Set aside.
Boil water in a large cooking pot. Add tomato, onion, and radish. Continue boiling for 5 minutes.
Add Knorr Sinigang sa Sampaloc Mix. Stir.
Put the fried fish slices into the pot. Let the liquid boil. Adjust the heat between low to medium. Continue boiling for 7 minutes.
Add eggplant and long green peppers. Cook for 3 minutes.
Add okra. Cook for 3 to 5 minutes.
Season with ground black pepper and fish sauce.
Put the fresh spinach into the pot. Cook for 1 to 2 minutes.
Transfer to a serving bowl. Serve warm. Share and enjoy!