STEP 1 Make the pickle ahead. Put the ginger, red chilli flakes, olive oil, red wine vinegar and sugar in a small pan and bring to a simmer. Peel the pears, cut them into halves or quarters and core. Drop them into the hot mixture with the chestnuts and leave to cool completely, turning the pears over once. Lift the pears out of the mix and put them in a bowl. Simmer the liquid until it is thicker and stickier, season, and pour over the pears. This will keep in the fridge for up to 3 days.