Put the rice in a slow cooker with the sugar. Add the milk and stir gently. Put the cooker on full power until it reaches simmering point. Turn it down to low and cook until the rice has absorbed all the milk. This should take about 2 and a half to 3 hours depending on your cooker.
Pour the rice into your serving dish and allow to cool before chilling in the fridge. Cut the peaches into wedges and push into the the chilled rice around the edge of the dish skin side up.