I cook sea/inland bass, or any white fish in kitchen foil.
One whole bass, cleaned. Leave on head and tail etc. De-scale of course.
Place fish on foil, lightly coat with your favourite cooking oil
Lightly stuff fish with chopped tomato, onion and your favourite herb.
Cover with foil, place in an ovenware dish, cook in a preheated fan assisted cooker at 250, for 10 minutes, then down to 180, for 20 mins. Check fish, make sure it is cooked through. Serve with whatever you usually serve with white fish.
Simple, but excelent. Or just place on a braai, (in foil etc) (BBQ) and cook...;>)
Steve