100²µ/3½´Ç³ú kale, torn into bite-sized pieces (stalks discarded)
2 leeks, finely sliced
1 lemon, zest and juice
600g/1lb 5oz swede, peeled and cut into 2cm/¾in chunks
1 tbsp Dijon mustard
400g tin haricot or butter beans
salt and freshly ground black pepper
2 garlic cloves, finely chopped
½ tsp cumin seeds
2 tbsp medium curry powder
50g/1¾oz plain white flour
2 tbsp light olive oil
50g/1¾oz unsalted butter, plus 50g/1¾oz, melted, for brushing
100²µ/3½´Ç³ú cheddar, grated
4 sheets filo pastry
750ml/1¼ pint full-fat milk