1 green chilli, thinly sliced
1 green chilli, seeds removed and roughly chopped
30g/1oz fresh coriander
1 tbsp lime juice
750g/1lb 10oz baby new potatoes, cut lengthways into 1cm/½in thick slices
½ small red onion, thinly sliced on a mandolin or by hand
1½ tbsp shop-bought tamarind paste
1½ tsp caster sugar
1 tsp chaat masala
¼ tsp chaat masala
1½ tsp coriander seeds, toasted
1½ tsp nigella seeds, toasted
2 tbsp olive oil
4 tbsp olive oil
salt
½ tsp ground turmeric
250g/9oz Greek-style yoghurt