Трамеццино аль Тоно

Two triangles of soft white bread, pressed thin and cut on the diagonal, the way a bar in Turin serves them with a drink.

• Tuna, flaked and mixed through, not mashed.
• Green olives, chopped rough for a salty bite.
• Mayonnaise, just enough to bind it.
• White bread, crusts off, pressed to seal.

The filling sits overnight so the olive and the tuna settle into each other, then the bread is trimmed and cut into triangles just before it goes out. Three or four bites each. It is the snack that arrives before you have decided what to drink. Contains: gluten, eggs, dairy, fish.