Tramezzino ai Funghi

A jar of mushrooms sott'olio sits on the back shelf of a Venetian bar's prep counter, the contents pressed deep under olive oil and showing dark glossy slices of champignon or sometimes whole small caps of porcini, with a clove of garlic and a sprig of parsley visible against the glass. The bartender unscrews the lid, lifts a generous spoonful onto a square of absorbent paper, presses a clean cloth on top, and waits the half a minute it takes for the oil to wick away into the paper. The drained mushroom is then chopped fine, folded into a small bowl of mayonnaise just enough to bind, and the bowl goes back into the fridge until the next batch of triangles needs assembling. The fill that ends up in the bread is the mushroom, the bind, and nothing else.

This is the lightest reading on the bar case. The plain ham triangle carries its weight in cured pork. The mushroom-and-cheese version brings a soft meltable dairy that fills the centre. The prosciutto-and-mushroom build pairs the same fungi with a cured-leg salt anchor. This one drops both meat and cheese. No prosciutto cotto folded against it. No fontina laid through it. The marinated mushroom carries the whole flavour load alone, with the bind doing only the structural work of sealing the crumb against the oil the mushroom still holds.

The fill comes in two acceptable shapes and the difference matters at the case. The first is funghi sott'olio, the cultivated champignon or wild porcini brined briefly, drained, packed in olive oil with garlic and parsley and a touch of vinegar; this is the standing pantry product an Italian bar buys in commercial jars and dispenses by the spoonful, and the fill carries a faint tang from the brine and oil. The second is freshly cooked funghi trifolati, sliced mushrooms stewed slowly in olive oil with chopped garlic and parsley until the pan goes dry of water, then pressed in a cloth; this is the kitchen-made alternative, slightly fresher in note and without the brine tang. A Veneto bar with a working kitchen often runs the trifolati version; a smaller bar with no kitchen runs the jar.

Three faults give a sloppy build away on the cut face. The marinated mushrooms straight from the jar, unpressed, carry enough oil into the bread that the lower slice goes translucent and oily within the hour; pressing is mandatory. The trifolati version still wet from cooking weeps mushroom water into the bottom face the same way, and unless cooked dry will turn the soft crumb to a grey damp paste. Bound too sparingly the chopped mushroom shakes free of the diagonal as soon as the triangle is picked up, the loose pieces falling onto the napkin as the customer eats. Bound too generously the fill turns to a slack paste with no mushroom texture left at all. The pancarrè, opened to the air, stiffens at the cut and cracks under the knife. A working build presses the mushroom hard, chops it fine, folds in just enough bind for cohesion, films both bread faces with a sealing layer and heaps the fill at the centre of the slice.

Lift one chilled from a case in the late afternoon. The triangle is light, cool, soft to grip. The first bite gives a soft tender crumb, then a slick mayonnaise glaze sealing the bread, then the chopped mushroom coming through dark and earthy and faintly resinous on the tongue, with the residue of garlic from the marinade or the pan sitting under the mushroom note. There is no dairy round, no cured pork salt push, no fish brine: the savour reads as a single woodsy line through a soft frame. The aftertaste is mushroom and a faint olive-oil sweetness, with a long mineral close that runs after the bread has dissolved. Nothing in the bite is warm, none of it sharp, and the triangle is the case's quietest filling.

The order at the case is a finger and a name. Uno con i funghi, in a Veneto bar, lifts this triangle from the row; uno con i funghi e formaggio calls for the dairy-bearing cousin; uno funghi e prosciutto for the ham build. The plain mushroom-only triangle sits at the cheap end of the row and is one of the few fillings on the case a customer with a dairy allergy or a stricter vegetarian discipline can take without a second question to the bartender. In a Milanese bar the triangle is reliable but less central than its ham-and-mushroom cousin; in a Roman bar the case is smaller and the customer may have to ask whether the bar carries the plain version at all that day.

Its near relatives all add back what this build leaves out. The funghi e formaggio build layers a mild meltable cheese (a fontina or domestic emmental) through the mushroom, lifting the salt and adding a dairy round that this triangle deliberately does without. The prosciutto e funghi build folds in cooked ham as a cured-pork salt anchor, the everyday Veneto staple. The artichoke build threads sharp carciofini sott'olio through for a herbal acid alongside the mushroom. The cream-cheese variant sits the fill in a richer denser bind. None of those is the plain meatless dairy-free triangle: the marinated or cooked mushroom alone, the bind, the soft crustless frame, with the row's only fully cured-pork-free and dairy-free reading.

A marinated mushroom on a 1925 form

The plain mushroom-and-bread triangle carries no inventor and no founding shop on record. Marinated mushrooms in oil and cooked-dry trifolati are two of the most ordinary kitchen and pantry products an Italian bar keeps on hand, and the case triangle of either inside the soft crustless frame is the obvious meeting of a stocked product with the existing form. The record attaches the build to no bar in particular.

The form has a precise Turin founding. In 1925, the the Demichelis-Nebiolo family, fresh off a long American stint, picked up the Mulassano on Turin's Piazza Castello, and there put a small soft sandwich on the bar, with no toasting and the crust shaved clean off, built on the boxed pancarrè the Turin bakeries already produced. The earliest filling documented there was butter and anchovy. The name was coined a little later by Gabriele D'Annunzio, who built tramezzino from tramezzo (meaning a partition) as an Italian alternative to the English sandwich; the first national recipe was published in La Cucina Italiana in July 1936.

The mushroom half of the build leans on the wider Italian pantry tradition. Funghi sott'olio, mushrooms packed in oil with garlic and herbs, is a household preservation method documented across Italian regional cookery from the late nineteenth century onward; commercial jars from producers like Saclà of Asti, founded in 1939, became standard bar-trade pantry products through the post-war decades. The Italian agriculture ministry's PAT roster opened in 1999 lists the parent tramezzino under Piedmont and recognises various regional traditions of mushroom preserving across Lombardy, Emilia-Romagna and Friuli, with no separate entry for the plain mushroom-only tramezzino build itself, which rests on the parent form's 1925 record.