For the ice cream, make a custard base ... Gas 3 and grease and line a 24cm/9½in loaf tin or a 20cm/8in cake tin. Weigh the orange pulp and keep 450g/1lb (discard the rest).
Put the whole oranges into a large saucepan, cover with water and bring to a boil with the lid on. Simmer for 20 minutes, strain off the water and top up again with cold water, bring to the boil ...