Clean and cut the catfish into portions. Season it well with salt and pepper to taste and soak it in freshly squeezed lemon juice. Transfer it to a glass cook pot with a lid and then pour on the white wine over it.
Put the fish, covered, in the refrigerator to sit for 1-2 hours. Then transfer the fish to a tray, thoroughly smear it with oil and sprinkle it with pieces of chopped garlic. Bake in a preheated 356°F (180 °C) oven until tender.
Serve with lemon, chopped fresh parsley and mashed potatoes. Optionally, add spices to your liking during baking.