450g/1lb roasted butternut squash (see recipe tips)
2 cooked red onions (see recipe tips)
1 bag baby spinach (about 240g/8Β½oz)
salt and ground black pepper
70²µ/2Β½΄Η³ϊ cheddar cheese, grated
375g pack ready-rolled puff pastry
250g/9oz natural yoghurt