Cooking oil for frying • medium fish (tilapia, salmon, galunggong, any white fish) • Salt • large onion (thinly sliced) • garlic (chopped) • ginger (cut into strips) • large tomato (cut into cube) • large pepper (cut into strips) • pineapple tidbits • cornstarch dissolve in 1/4 cup water • pineapple juice reserved • ketchup •