Zuppa di Pesce alla Viareggina

Ingredients

• For the fish stock
• 1 kg fish heads and frames, from the fish used in the stew
• 1 strip lemon zest, pared with a peeler, white pith avoided
• 1 pinch saffron
• For the stew
• 300 g monkfish, trimmed, cut into 4 cm pieces
• 300 g sea bass fillet, skin on, cut into 4 cm pieces
• 200 g sole or whiting fillet, cut into 4 cm pieces
• 200 g small cephalopods, cleaned squid or cuttlefish, cut into rings
• 300 g clams, purged in cold salted water
• 300 g mussels, scrubbed and debearded
• 150 ml dry white wine, Vermentino or Vernaccia di San Gimignano
• 400 g ripe tomatoes, peeled, seeded, roughly chopped; or tinned whole plum
• 3 garlic cloves, 2 finely sliced for the stew, 1 whole for the bread
• 60 ml extra-virgin olive oil
• 1 small bunch flat-leaf parsley, stems separated for stock, leaves finely chopped for finishing
• 1 tsp fine sea salt, adjust to taste
• For the bread
• 4 thick slices Tuscan unsalted bread, cut 2 cm thick

Method

1. 1
   Place the fish heads and frames in a saucepan with the parsley stems, lemon zest, and enough cold water to cover by 5 cm. Bring to a bare simmer over medium heat — never a rolling boil. Skim thoroughly and hold at a trembling simmer for 25 minutes. Strain through a fine sieve lined with damp muslin, discarding all solids. Return the strained stock to a clean pan, add the saffron, and reduce over medium heat until approximately 750 ml of amber-clear liquid remains. The stock is ready when it is transparent and carries a concentrated marine sweetness on the nose.
2. 2
   Warm the olive oil in a wide, heavy sauté pan over medium heat. Add the sliced garlic and cook without colour until it turns soft and fragrant — roughly 2 minutes. Add the tomatoes and cook, stirring occasionally, until they break down into a rough sauce and the oil begins to separate at the edges, about 10 minutes. Pour in the white wine and allow it to reduce by half. The smell shifts from raw to cooked fruit; the wine's sharp acidity mellows into the background.
3. 3
   Pour the reduced fish stock into the tomato base and bring the pan to a steady, uncovered simmer. This is where the dish lives or dies: maintain a gentle, open simmer throughout all fish additions — any vigorous boil will emulsify the fat and collagen from the fish into the broth, destroying the amber clarity that defines the Viareggina style. The broth must remain transparent and moving, never cloudy and bubbling.
4. 4
   Add the cephalopods first, as they require the longest cooking. Simmer uncovered for 8–10 minutes. Then add the monkfish and sea bass. Simmer for a further 4–5 minutes — the firm fish will just begin to yield when pressed with a finger but still hold their shape.
5. 5
   Add the sole or whiting last among the fish varieties, followed immediately by the clams and mussels. Cover the pan for 2–3 minutes only. The shellfish are done when every clam and mussel has opened; discard any that remain shut. Remove from heat immediately and transfer to a warmed service vessel — do not leave in the cooking pan, as residual heat will continue to cook the fish.
6. 6
   While the shellfish open, toast the bread slices aggressively under a grill or in a dry pan until deep golden and rigid. Rub each slice immediately and vigorously with the cut side of the whole garlic clove while the bread is still hot — the heat activates the garlic's volatiles. Place one slice in each warm bowl.
7. 7
   Ladle the stew and broth over the bread, scatter with the chopped parsley, and finish with a thread of raw extra-virgin olive oil. The bread should be submerged just enough to absorb the broth without dissolving entirely.