Preheat the oven to 180 C.
Slice the plantains into ¼ inch rounds (keeping the skin on). Use a knife or a mandoline for slicing.
Toss the plantains with sambar powder, curry leaves, coconut oil, and salt. Lay them out on a large baking tray in an even layer without too many overlaps.
Bake in the top rack of your oven for 15-20 mins until golden and crispy. Serve immediately.