Preheat your oven to 180℃ and spread your hazelnuts out on a baking tray. Cook these in the oven for about 10 minutes, giving the tray a shake half way through, until they have turned a light golden brown and smell toasty. Remove from the oven and leave to cool a bit, then chop roughly.

Heat a griddle pan until it is very hot. Brush the peaches lightly with the oil, then place, cut-side down, onto the pan and do not move them for 2 to 3 minutes, until they are ready to release from the pan - do this using a flexible spatula and gently prod the peaches. If they move, carefully turn them over to cook the other side. Once both sides of the peaches are nicely charred, move them onto individual serving plates or onto a big platter and sprinkle over a little salt and a few grinds of black pepper.

To serve, arrange the slices of Prosciutto around and over the peaches, then the slivers of Comté, drizzle over the hazelnut oil or extra virgin olive oil, squeeze over a little lemon juice, drizzle over a little vinegar (if using) and finally sprinkle over the grated lemon zest, chopped hazelnuts and mint leaves.