Begin by thoroughly washing the fish under cold running water. Remove any scales, gills, and internal organs if not already cleaned. Rinse the fish several times to ensure all impurities are removed. Pat the fish dry using paper towels to remove excess moisture. This step is crucial because dry fish fries better and results in a crispy texture. Place the cleaned fish on a tray and prepare for seasoning.
Using a sharp knife, make diagonal cuts on both sides of the fish. These slits allow the seasoning to penetrate deep into the flesh, ensuring every bite is flavorful. Be careful not to cut too deeply to avoid breaking the fish. Proper scoring also helps the fish cook evenly during frying. Set aside once done.
In a small bowl, combine salt, black pepper, garlic, ginger, paprika, seasoning cube, and lemon juice. Mix thoroughly until a smooth paste forms. This marinade will enhance the flavor of the fish and give it a delicious Ghanaian taste. Adjust seasoning to your preference.
Rub the marinade thoroughly over the fish, ensuring it gets into the slits and inside the cavity. Massage the seasoning into every part of the fish to maximize flavor. This step is essential for achieving authentic taste.
Cover the seasoned fish and let it marinate for at least 20–30 minutes. This resting time allows the flavors to penetrate deeply into the fish, resulting in a more flavorful dish. For best results, you can refrigerate the fish while marinating. Proper marination is key to authentic Ghanaian fried fish.
Pour vegetable oil into a deep frying pan and heat over medium heat. Ensure the oil is hot but not smoking. Proper oil temperature ensures the fish fries evenly and becomes crispy without burning. You can test the oil by dropping a small piece of fish into it; if it sizzles, the oil is ready.
Gently place the marinated fish into the hot oil. Avoid overcrowding the pan, as this can reduce oil temperature and affect crispiness. Fry the fish carefully to prevent breaking.
Allow the fish to fry on one side for about 6–8 minutes until golden brown. Turn carefully using tongs or a spatula. Fry the other side until crispy and fully cooked.
Keep an eye on the fish while frying to ensure it does not burn. Adjust heat if necessary.
Once cooked, remove the fish and place on paper towels to absorb excess oil.
Slice onions or prepare pepper sauce to serve with the fish.
Arrange the fried fish on a serving plate with sides like rice or banku.
Serve hot and enjoy your authentic Ghanaian fried fish.