Tramezzino alle Verdure Grigliate

A vegetable just off a ridged iron is the wrong object to put in a sandwich. Hot, slick with cooking oil, and weeping internal juice across the cutting board, a slice of grilled aubergine or pepper at that moment would turn a soft crustless loaf to grey paste inside ten minutes. The grilled-vegetable triangle is built on the premise that this object is fixable with time and a rack: pull the slices off the iron, lay them flat across cooling racks for ten minutes so the radiant heat lifts off, then pat each face with paper until the surface oil is gone and the inner juice has stopped weeping. Only then do they go anywhere near bread.

The vegetables run the bar's summer plate. Zucchine cut lengthwise into long strips and grilled until the rib marks darken. Melanzane sliced in rounds and grilled past the raw-bitter stage to a soft custardy give. Peperoni quartered and grilled until the skins blister and lift off, then peeled and laid open. Each carries flame at the surface, smoke at the edge, sweetness inside, oil as a season. None carries any animal cure or any dairy fat. The triangle is built without either, and the bind has to do the work an absent ham or cured fish would otherwise do.

It fails on water, on oil, and on knife work. Vegetables grilled too short hold raw bitterness in the aubergine and a sharp green note in the pepper, both of which read wrong against the soft white bread. Vegetables grilled long enough but not drained release their loose juice into the crumb during the long fridge wait, leaving the base slice grey and slick by mid-afternoon. Slices left thick sit as lumps that fall out the cut diagonal; slices cut too thin go to slack ribbons that bunch toward one end of the triangle. The bind fails its own way: a mayonnaise that has been worked too thin slides off the cooked surfaces under refrigeration, leaving the inner crumb unprotected. A working build uses fully-cooked vegetables, dried on paper, sliced to a uniform thinness, and the bind chosen for grip on a cooled surface.

Lift one from a Bolognese or Roman bar around two in the afternoon and the cross-section already says where it sat: bright pepper red banded against deep aubergine purple banded against the pale yellow-green of the zucchine, all of it tucked inside the white frame. Cool from the case. The first bite goes through the bread to the bind, then arrives at the vegetable layers, the aubergine soft and faintly smoky on the tongue, the pepper a sweeter pulp behind it, the zucchine a gentler vegetal note running under both. There is no salt slick the way a cured ham gives. The aftertaste is warm green and faintly burnt, the trace the iron left at the surface coming through clean because nothing else competes with it. The bite reads light, well under a hundred grams for a full triangle.

The vegetable triangle has its own ordering register in the Italian bar case. A customer leaning toward the glass and asking for il vegetariano at most bars will land on the lettuce-and-tomato version, the cold mayonnaise-bound salad triangle; asking instead for quello alle verdure grigliate, the one with grilled vegetables, picks out specifically this build, the hot-iron summer plate condensed into bread. Bars in Rome and Bologna use both names interchangeably on the chalkboard, while Milanese and Venetian bars tend to keep the grilled build under its full name to distinguish it from the simpler cold-vegetable filling. Either order falls inside the magra category, the lean choice, the standard meatless pick in the row.

The siblings keep the vegetable thread and change the cheese or the meeting. Lay fresh fior di latte alongside the grilled vegetables and the build picks up a milky pad that pulls it closer to the cold tomato-and-mozzarella triangle, the caprese filling. Smear a basil pesto across the inner crumb and the green vegetal note moves from char to fresh basil. Drop a thin layer of soft scamorza against the vegetables and the smoke compounds twice over, into its own separate filling. Inside the same case the plain cold lettuce-and-tomato vegetable triangle is the lighter sibling without the grill mark; the breakfast egg-and-asparagus build is the same vegetarian register pushed toward the morning. A variant of the grilled-vegetable triangle none of these counts as, because the iron itself, and the moisture work that follows, is the defining decision the others skip entirely.

Origin and history

The grilled mixed-vegetable plate the triangle borrows from is Italian summer staple older than the bar form. Verdure grigliate as a household antipasto belongs to the southern peninsula's open-fire tradition, with Sicilian, Pugliese and Campanian household versions documented in regional cookbooks well before refrigeration reached every kitchen. Northern Italian bars adopted the same plate for cooked-cold service in the post-war decades, the ridged iron piastra entering Italian restaurant kitchens widely from the 1960s onward and changing the standing antipasto offering accordingly.

The triangle they ride in was put together at Caffè Mulassano in Turin in 1925, when Angela Demichelis and her husband Onorino Nebiolo, recent returners from a Detroit stretch, set up the toast-less crust-trimmed form on the boxed white loaves the city's bakers were already producing. The Mulassano fillings of the founding years were anchovy butter, prosciutto and tuna; the vegetable adaptation arrived later. The first reliably documented Italian vegetable tramezzini cross over from regional cookery columns into bar use in the 1950s and 1960s, with vegetable-and-mayonnaise builds appearing on Italian bar menus from the late 1950s and the grilled-vegetable register following as the iron-cooked antipasto spread.

The Italian agriculture ministry opened its national catalogue of traditional regional foods in 1999, and the Piedmontese tramezzino sits on the list as a recognised regional product. The grilled-vegetable filling has no separate registration. It carries the parent form's record and the regional vegetable tradition behind it, the southern open-flame habit meeting a northern bar form devised four hundred kilometres away in 1925.