- Clean the tilapia and make a slit on the side. Deepen and widen the cut along tilapia belly by using a sharp pointed knife.
- Sprinkle both sides of the fish including the stomach/belly with salt. Set aside.
- Mix the soy sauce, chopped onions and tomatoes in a bowl.
- Fill the mixture to tilapia belly.
- Prepare the banana leaves by greasing it with butter.
- Wrap the fish tightly with the greased banana leaves.
- Grill the fish for about 20 minutes, 10 minutes on each side.
- Serve with rice and toyomansi* sauce.
* Toyomansi - 2 tbsp soy sauce + 1 tbsp kalamansi or lemon