Pre-heat oven to 400F
In a large mixing bowl, combine sliced butternut squash with a good drizzle of olive oil (enough so it coats each piece), turmeric, coriander seed powder and cumin seed powder.
Transfer to cookie tray, (spread evenly across it) and place in oven for 20 minutes.
When roasted, sprinkle with sea salt and allow to come to room temperature- around 15 minutes.
Spoon yoghurt into individual glasses and layer with butternut squash slices. Or you could slather a layer into individual small plates and place butternut squash slices on top.
Dust with dried mint and a drizzle of olive oil.
Serve with pillowy bread like nan-e-barberi from an Irani store. Or you could use pita bread.