There is a moment, at every well-built Sardinian dinner, when a dish arrives that seems to contain almost nothing: a few thin slices of dark amber, a drizzle of oil, perhaps a sliced raw artichoke. It is the simplest dish of the evening and also the most expensive. Grey mullet bottarga from the Stagno di Cabras is one of the most expensive foods in Italy, and to understand why you have to look at how it is made — and who makes it.
The fish, the lagoon, the gesture
Grey mullet is a euryhaline fish: it lives where fresh and salt water mix. The Stagno di Cabras, in the Gulf of Oristano, is one of these places — a lagoon fed by a river, protected under the Ramsar Convention, where two species of mullet alone make up more than ninety-five per cent of the catch.
Bottarga is made from the ovarian sacs of the females, and the first rule is that they must come out whole. A torn ovary does not become bottarga: it becomes waste. That is why the fishermen of Cabras use a specific grip, known locally as ammanuncadura, which holds the fish still at the gills without squeezing the abdomen. It is a gesture learned by watching, and it survives because no machine can do it.
Fishing is concentrated between June and September, when the sacs are at the right stage of maturity. It takes place in the lavorieri, pens about a metre wide set along the natural channel, with nets that still carry their age-old names: su pezzu for the large net, the coppo for the hand net.
From sac to baffa
The process is quick to describe and very long to carry out well.
Extraction. By hand, immediately, without tearing the membrane that holds the eggs together.
Salting. Under sea salt. The time is not fixed: it depends on the size of the sac and the ambient temperature that day. This is the stage that decides how salty the bottarga will be, and where you can see the hand of the maker.
Drying. In the open air, for a period that the Presidium’s production guidelines set at between four and fifteen days. Here too the margin is wide because the product is not counted in days but judged by touch.
It is worth being precise, because you read all sorts of things: both the artisanal and the industrial method often also involve pressing between wooden boards with weights stacked on top, followed by ageing for a few months. This is the classic procedure, the one that gives the baffa its compact shape. It does not, however, appear in the Slow Food Presidium’s guidelines, which describe a shorter cycle. They are two legitimate interpretations of the same product, and whoever sells it should be able to tell you which one was followed.
What “from Cabras” really means
Here lies the point that separates a product costing two hundred and fifty euros a kilo from one costing half that, and which almost nobody explains to the customer.
Cabras bottarga has neither a PDO nor a PGI. In May 2025 it was recognised as a Slow Food Presidium, under the name “Grey mullet bottarga and traditional fishing of the Stagno di Cabras”. The Presidium involves around a hundred and thirty fishermen in ten cooperatives, and alongside bottarga it protects two other preparations of the same tradition: merca, boiled mullet wrapped in marsh herbs, and su pisci affumau.
A Presidium is not a European designation: it is a protection project, not a legal mark. This makes knowing how to read the label all the more important, because local production is tiny — a few tonnes a year, far from enough to meet demand, with Japan and Germany among the main markets.
This leads to a reality worth knowing: much “Sardinian” bottarga is processed in Sardinia, but from imported roe, often from Mauritania, from sea mullet with a completely different diet from lagoon fish. It is a legitimate and sometimes good product, but it is not the same thing and does not cost the same. The wording to look for on the label is explicit: caught in the Cabras lagoon. Everything else — “made in Sardinia”, “Sardinian processing” — describes where it was processed, not where it was caught.
A lagoon protected by fishing in it
The Stagno di Cabras is not a natural environment in the sense of untouched: it is a managed environment. Traditional lagoon fishing works through a system of sluices and pens that regulates the passage of fish between the lagoon and the sea, exploiting the migratory movements of euryhaline species rather than opposing them.
It is an ancient model and a surprisingly modern one: fish are taken when they are leaving the lagoon anyway, at a precise moment in their cycle, and the infrastructure that makes this possible is the same that maintains the exchange of water between lagoon and sea. Without that maintenance, the lagoon would deteriorate.
This explains why the Presidium protects not only a product but, in its very name, “the traditional fishing of the Stagno di Cabras”. What is being protected is not the bottarga: it is the system that makes it possible — the cooperatives, the pens, the techniques and the people who know them.
It is worth bearing in mind when faced with a dish that seems to contain almost nothing. That almost nothing is the visible result of a balance that took centuries to establish and that a few years of neglect would be enough to dismantle.
Mullet or tuna: two products, not two grades
Tuna bottarga is often presented as the cheaper version of mullet bottarga. It is more accurate to consider them two different ingredients.
Mullet bottarga has an amber colour that shades into orange, keeps the shape of the ovarian sac — the characteristic “baffa” — and has a subtle flavour, with an aftertaste somewhere between sweet and bitter. It is an ingredient to use raw, where its delicacy comes through.
Tuna bottarga is darker, tending towards brown, and is pressed into regular blocks with heavy presses. The flavour is bold, saltier, with an almost smoky note. It dominates, and so it works better where there is already structure: substantial seafood pasta dishes, full-flavoured risottos.
Putting tuna bottarga on delicate raw fish wastes both. Using mullet bottarga in a long-cooked sauce throws away two hundred and fifty euros a kilo.
How to serve it
Sliced. This is the form that takes the most courage and gives back the most. Very thin slices, cut with a sharp knife from the whole baffa, a drizzle of extra virgin olive oil and nothing else. The classic Sardinian accompaniment is sliced raw artichoke, whose vegetal bitterness counterpoints the saltiness; alternatively, fresh celery with a lemon vinaigrette. As a starter or with an aperitivo, with a well-chilled white.
Grated. Over spaghetti, over seafood fregola, over a risotto, over pasta with clams. Here one technical rule saves the dish: always add it off the heat. Direct heat makes it bitter and dissolves its aromas. Bottarga is not cooked: it is laid on top.
For wine, the Oristano tradition points to Vernaccia di Oristano, an oxidative, complex wine that stands up to bottarga’s persistence like no other. The most common choice today is Vermentino, which works beautifully with grated bottarga; for sliced bottarga dressed with oil and lemon you need a white with some body — a Vermentino di Gallura Superiore, for instance — because the delicate version risks being wiped out.
The two other things the Presidium protects
Bottarga is the famous part, but the Stagno di Cabras Presidium includes two others, and they are perhaps more interesting precisely because nobody knows them.
Merca is mullet boiled in lagoon water and then wrapped in marsh herbs — zibba, the salty grass that grows on the lagoon’s shores. The wrapping is not decorative: it flavours the flesh and slows its deterioration. It was how fish reached inland markets before the cold chain, and it has a taste like nothing else, vegetal and brackish at once.
Su pisci affumau is smoked mullet, another age-old answer to the same problem: how to make an oily fish last in a hot climate.
Together with bottarga they form a complete system, and tell a truth that applies to the whole of Mediterranean peasant cooking: almost every product now considered a luxury started out as a preservation technique. Bottarga was not invented to be expensive. It was invented because mullet roe, in summer, rots within a few hours.
The most common mistakes
We see four regularly, and all of them are avoidable.
Adding salt. Bottarga is by definition already salty. A plate of spaghetti with bottarga needs very little salt in the cooking water, and pecorino has no place on top: the two savoury notes cancel each other out rather than adding up.
Cooking it. We repeat it because it is where most product is ruined: in contact with direct heat it turns bitter. Always add it off the heat, tossing it through.
Slicing it thick. The slices should be almost transparent. A charcuterie-style thickness turns a subtle experience into a mouthful of salt.
Serving it straight from the fridge. As with cheese, bottarga that is too cold has no aroma. Take it out a quarter of an hour in advance.
Buying and storing it
It comes in three forms. The whole baffa is the noble form and the one that allows slicing. The baffa “con unghia” — with the membrane still intact at one point — is considered the most prized format. Ground bottarga is convenient but loses its aromas quickly and gives no control over the texture: if you need it grated, grate it yourself.
All formats come vacuum-packed after drying. Once opened, the baffa should be wrapped in foil or cling film and kept in the least cold part of the fridge: it keeps for several months. Preserved in oil in a jar, on the other hand, it lasts about twenty days.
What to look for when buying: the colour should be even, without much darker areas that indicate uneven drying; the texture firm but not glassy. Very hard bottarga has been over-dried and will be bitter.
Why it costs what it costs
Put the pieces together and the price stops looking arbitrary. You need a wild fish that cannot be farmed. You need to catch it within a window of three or four months. You need to extract a fragile part by hand without breaking it, which requires a technique handed down through generations. You need to salt and dry it by eye, without fixed recipes. And all of this produces, in a year, a few tonnes for an international market.
Then there is a component that appears on no price list. Traditional fishing in the Stagno di Cabras is the reason that lagoon is still a lagoon and not something else: an economic safeguard that justifies looking after the environment. Buying the right bottarga means, very concretely, paying someone to keep taking care of a lagoon.
Finally, there is a reason that is harder to put into words but just as concrete. Bottarga is one of the few foods in which the difference between excellence and mediocrity cannot be corrected later. A mediocre tomato can be fixed by cooking it; modest meat can be made up for with a marinade. A bad bottarga — too salty, too dry, from roe of uncertain origin — stays bad, because you eat it practically as it is. Everything is decided in the hours between catching and salting, and from then on there is nothing more to be done.
That, served in thin slices at a table overlooking the sea, it is also one of the best things you can eat in Sardinia is almost a detail.