Sweet Potatoes

• 400 g (14 oz) white sweet potato
• 40 g (1½

Cook the sweet potato whole in a saucepan of boiling water until it is completely cooked and tender in the middle, about 20 minutes. Remove the sweet potato and peel. Chop it roughly and place in a bowl with the butter. Use a stick blender to mash it to a paste. Add the sugar, evaporated milk, whipping cream and half of the egg yolk (saving the other half for the next step). Mix together with a