Heat oven to 150°C/130°C fan/gas 2 and line 2 baking trays with baking paper. Wash the kale and dry thoroughly.
Place in a large bowl, drizzle over the oil, then add the cumin, coriander and salt. Mix well, tip onto the trays and spread out in a single layer. Bake for approximately. 20 mins or until crisp but still green, then leave to cool for a few minutes.
Optional but super tasty - Instead of 1/2 tsp Sri Lankan Cumin, you could use 14 tsp cumin and 14 tsp turmeric powder. This gives the kale a really vibrant colour too.Once finished, they came out of the oven looking a little like dried seaweed (that's what the kids said). It didn't smell or taste like it though.
Thin, crispy and melt in the mouth flavour, this dish has been a big hit with everyone.