-
1
Place the beef, pork, onion, carrot, and celery in a heavy pan. Add the white wine and tomato. Braise over a low heat, partially covered, until the meats are fully tender and the liquid has reduced to a concentrated, moist braising juices. The meats should offer no resistance when pressed with a spoon.
-
2
Remove the meats and mince them finely — through a mincer or by hand with a knife — until the texture is uniform and close. Combine the minced meat with the beaten egg, Parmigiano, nutmeg, and lemon zest. Add braising liquid, a spoonful at a time, until the mixture just holds together and feels moist but not wet. The filling must not be dry: this is where the dish lives or dies — a parched filling produces a hollow, flavourless centre, and no amount of crust will compensate.
-
3
Pit each olive by cutting from the stem end in a continuous spiral, releasing the pit while keeping the olive flesh in one intact piece. Reform the olive around a small nugget of filling, pressing it back into its original shape. The surface should be smooth and the filling fully enclosed — no gaps in the olive flesh.
-
4
Optionally, refrigerate or freeze the stuffed olives for 30 minutes until firm. Roll each olive in flour, shaking off the excess; pass through beaten egg; coat thoroughly in fine breadcrumbs. The breadcrumb layer must be even and complete, with no bare patches visible.
-
5
Heat the frying oil in a deep, heavy pan to 170 °C. Fry the olives in batches — do not crowd the pan — until they are deeply golden and the crust is dry to the eye. Lift one and listen: it should sound hollow when tapped. Drain on absorbent paper.
-
6
Serve immediately while the crust shatters and the centre is hot. The three-layer contrast — crust, olive, filling — must be experienced in a single bite while hot; they do not wait.