If you don't have one that is large enough, use two, dividing the seafood between them. Keto diet followers need to omit the banana chillies and spring onions, and go light on the salsa verde.
In a heavy-bottomed pot or Dutch oven, melt the butter over medium heat. Add the flour, stirring often, and cook to a medium-brown roux, about 30 minutes.
According to OceanBox Seafood, because wild-caught fish are not confined to smaller spaces or fed a manufactured diet, wild-caught fish can sometimes be healthier than farm-raised fish.