Add the parsley, half of onion , basil, tomato, and ginger and garlic paste to blender and blend till smooth
Add the blackpepper, oil, stock cube, salt ,pepper, njangsa powder, and sliced onions together to make a marinade paste
Make 3 diagonal cuts on each surface of the fish
Reserving 2 tablespoons, Season fish with paste gently flip them back and forth until coated inside and out
Let marinate in the fridge for at least 2 hours or overnight for best results
Spray an oven dish or tray with cooking tray or brush with oil
Brush the left over marinate on the fish alongside the rest of the onion slices
Grill in for approximately 40 minutes flipping half way through
Serve warm with airfried plantains and myondo and the motherland chilli paste or chilli mayonnaise (be careful with the bones especially if you are not used to eating this genre of food)