Bangus / Paksiw

Ingredients:

1 k. bangus
1/2 head garlic, crushed
1 thumb size ginger cut into thin slices
1 medium size onion, quartered
1 tbsp. whole black pepper
1/4 c. vinegar or 3 tbsp. sampalok sinigang mix
3 whole green sili
cooking oil
salt
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Bangus / Paksiw with vegetable , ampalaya or eggplant