It's Optional but wash the fish with vinegar to get rid of rawness and cleanse the fish.
Season fish with salt and pepper. A generous amount I would say. Then stuff fish with the above stuffing for the gut.
In a big frying pan with medium heat, add oil. After the pan becomes heated add seasoning (thyme, garlic, onion, scallion, pepper, pimento) and sautés until seasoning becomes translucent. Adding tomato is optional. I didn't have any so I cooked without.
Add fish to the pot and reduce heat to medium-low. Then add butter to the pan and cover to cook.
If fish becomes dry add 1 oz of water to the pot and cover. Let it cook until the fish is tender.
Before the fish is done, add Spinach and base the fish with the fish sauce. Cook for 2 minutes.
Serve and garnish with fish sauce and herbs.