2 carrots, peeled and finely chopped
1 stick celery, finely chopped
2 tbsp chives, finely snipped, to serve
4 cloves garlic, finely chopped
handful fresh kale, leaves only
1 large onion, finely chopped
1kg/2lb 4oz Maris Piper potatoes, peeled and cut into chunks
1 sprig rosemary
2 litres/3陆 pints good-quality chicken stock
salt and freshly ground black pepper
2 tbsp olive oil
200g/7oz unsalted butter
2 tbsp unsalted butter
300ml/10fl oz double cream
2 ox cheeks, trimmed and cut in half