Kale and Nutmeg Mashed Potatoes

• 1.5 kg white potatoes
• 100 g butter
• 1 leek

Peel and halve your potatoes, place in a pan and cover with cold water and a couple of pinches of salt. Place on a high heat, bring to the boil and simmer until cooked. While your potatoes are cooking, put a frying pan on a high heat and melt your butter. Turn the heat down to low and add your leeks, frying them off until they’re soft. Throw in your kale and the nutmeg and cook until the kale i