300g/10½ oz green beans, steamed
2 onions, thinly sliced
500g/1lb 2oz swede, peeled and diced
500g/1lb 2oz sweet potato, peeled and diced
6 sprigs thyme, tied together with string
2 tsp English mustard
2 tbsp beef gravy granules
150ml/5fl oz beer (or use an extra 150ml/5fl oz beef stock)
500ml/18fl oz beef stock
salt and freshly ground black pepper
1 tbsp olive oil
50g/1¾ oz butter
100g/3½ oz half-fat crème fraîche
8 good-quality pork sausages