800g/1lb 12oz Swiss chard
1 garlic clove, finely sliced
1 small onion, finely chopped
pinch dried chilli flakes
400g/14oz penne rigate
sea salt and freshly ground black pepper
2 tbsp olive oil
50ml/2floz double cream
freshly grated parmesan, to serve
75g/3oz sliced pancetta, cut into matchsticks
150g/5oz Tuscan sausages, skin removed, finely chopped