Steak for two

1 large sweet potato, peeled and cut into chunks

2 parsnips, peeled and thinly sliced

1 tbsp rapeseed oil

sea salt and black pepper

1 large rib eye steak, preferably on the bone (14-16 oz)

½ lb full fat butter, at room temp

200ml full fat cow’s milk

salt and white pepper, for mash

6 cloves garlic, crushed

handful fresh parsley, chopped

few sprigs of rosemary, chopped