If you will be using diced peaches, cut the peaches into sticks first, then into large dice.
Remarks
The choice of peaches is very important. What the peaches look like doesn't matter ('pêches de vigne' or bush peaches are often ugly and stunted, but have an extraordinary flavour), but their ripeness does: they must be perfectly ripe with plenty of flavour and bought when fully in season. Beware of those good-looking peaches out of season which are often hard and, above all, tasteless.
