Begin by making a homemade seafood stock. In a pot, melt a spoonful of lard or neutral oil and add the prawn heads and shells. Cook over medium heat until they release their briny aroma and deepen in colour—this step extracts the fat-soluble compounds responsible for richness and colour. Add onion trimmings, chopped celery, and crushed garlic, stirring briefly to evaporate excess moisture. Pour in about 1.2 litres of water and simmer uncovered for 30–45 minutes. Strain and reserve.

Next, make the dark roux. In a heavy-bottomed pot, melt 75 ml of lard or neutral oil over medium heat. Stir in the flour and begin cooking, stirring constantly to avoid scorching. The goal is a deep, reddish-brown roux—somewhere between red brick and 70% dark chocolate. This process can take 20 to 30 minutes. Go slowly to allow even Maillard reactions, yielding rich, nutty, and biscuity flavours. Once the roux reaches the desired shade, switch off the heat and allow the residual warmth to carry it just shy of smoky.

With the pan still hot, immediately add the chopped onion, celery, and green bell pepper—the Louisiana "holy trinity". Stir well to cool the roux and begin softening the vegetables. Cook gently until translucent, then add the crushed garlic. Stir in bay leaves, dried thyme, smoked paprika, and cayenne pepper to taste. Add the chopped tomatoes and cook for 5 more minutes to reduce slightly.

Add the sliced okra and cook for several minutes before adding the stock. Coating the okra in fat at this stage reduces excessive mucilage and promotes a refined texture. Once the vegetables are softened and aromatic, gradually add the seafood stock. Begin with small amounts to allow any residual starch to hydrate and swell, then pour in the rest. Simmer uncovered for 30 minutes, allowing flavours to deepen and the gumbo to thicken naturally.

Add enough gumbo to a separate casserole or pan to cover all the seafood you intend to cook in one serving. Add the prawns and crab meat. Let it simmer gently for 4–5 minutes until just cooked. Reduce the heat and stir in the oyster liquor to taste—this introduces briny depth and helps fine-tune salinity. Taste and adjust the seasoning with salt and black pepper. (I recommend serving hot sauce on the side instead of adding it directly, to allow more control.) Finally, add the oysters and let them warm through without overcooking.

Serve hot over freshly cooked white rice and garnish with chopped parsley and scallion.