Your eyes aren’t playing tricks on you: Yes, after simmering the fish with aromatics, wine, and tomatoes, we advise you to force every last bit through a food mill—heads, tails, bones, and all—for an incredibly lush soup, tasting of a beautiful union between land and sea (the food mill will strain any unwanted solids to be discarded). A garlicky rouille, exotic with a touch of crumbled saffron, further coaxes out the natural richness of the fish.
