II
The Method
1
Place the pre-cleaned tripe in a large pot of cold unsalted water. Bring to a full boil and blanch for 15 minutes. Drain, rinse under cold running water, and discard the blanching liquid. This second blanching removes the industrial bleach taste of commercial cleaning. The tripe should smell clean and neutral — no chemical note remaining.
2
Once cool enough to handle, cut the blanched tripe into strips of approximately 2 cm width. Strips at this dimension will cook through during the braise while retaining enough structure to hold shape through the subsequent bake.
3
In a wide, heavy-based pot, warm the olive oil over a medium flame. Add the chopped onion, carrot, and celery. Cook the soffritto slowly until the vegetables are fully softened and translucent but have taken no colour — approximately 12 to 15 minutes. The pot should smell sweet and gently savoury, with no raw sharpness from the onion.
4
Add the tripe strips to the soffritto and raise the heat to medium-high. Pour in the white wine and allow it to reduce by half, stirring to coat the tripe. The sharp alcohol note should give way entirely to a clean, dry fragrance before the stock is added.
5
Pour in the veal stock. There should be sufficient liquid to just cover the tripe. Bring to a gentle simmer, cover, and braise for 2 hours. The tripe is ready when a strip yields completely to pressure between two fingers with no resistance at its core — tender throughout, not gelatinous, not tough. This is the Parmigiana version: the braising liquid remains white and clear, never coloured with tomato.
6
This is where the dish lives or dies. Remove the lid and allow any excess braising liquid to reduce until the tripe is moist but not swimming — it should hold its position in the pot rather than floating. Grate in a pinch of nutmeg and stir briefly over the heat. Transfer a layer of tripe into a terracotta baking dish, cover generously with grated
Parmigiano-Reggiano, then add the remaining tripe and finish with a final, heavy layer of Parmigiano across the entire surface. The cheese must be applied in true quantity — a thin dusting will not form the crust that defines this dish.
7
Place the terracotta dish in an oven preheated to 200 °C. Bake for 15 minutes. The dish is ready when the Parmigiano has melted, bubbled, and formed a continuous golden-brown crust across the surface, with deeper colour and crystallisation at the edges. A pale or unmelted surface means the gratinata is incomplete — return to the oven.