Slice the tilapia crosswise into half. Rub salt all over the fish. Let it stand for 10 minutes.
Heat 1 cup of cooking oil in a pan.
When the oil turns hot, pan-fry each side of the tilapia in medium heat for 5 minutes.
Remove the tilapia and place in a clean plate. Set aside.
Meanwhile, scoop about 2 tablespoons of cooking oil from the pan where the fish was fried and place it in a cooking pot.
Heat the cooking pot. When the oil heats-up, sauté the garlic, onion, and tomatoes
Add the miso paste and then pour-in the fish sauce and water. Let boil.
Add the sinigang mix. Stir.
Put the fried tilapia in the cooking pot. Cook for 3 minutes.
Add the okra. Cook for 2 minutes.
Turn the heat off. Sprinkle some ground black pepper and add the mustard leaves. Cover for 5 minutes.
Transfer the fish into a serving bowl.
Serve. Share and enjoy!