200g/7oz rainbow or swiss chard, roughly chopped
400g/14oz chestnut mushrooms, halved
½ tsp chilli flakes
4 garlic cloves, whole and unpeeled
20g/¾oz fresh sage leaves
400g tin chopped tomatoes
300²µ/10½´Ç³ú pasta shapes, such as conchiglie
75g/2¾oz white or panko breadcrumbs
2 tsp olive oil
1 tsp sea salt flakes
200g/7oz feta cheese, crumbled