Mix the carrots, oil, sesame seeds and salt in a bowl, transfer to a baking tray lined with baking paper, place a second sheet of baking paper on top of the vegetables.
Approx. 20 mins. in the centre of an oven preheated to 200°C. Mix the sweet potatoes, oil, sesame seeds and salt in the same bowl. Remove the upper layer of baking paper, add the sweet potatoes to the tray of carrots. Return to the oven for approx. 40 mins.
In a bowl, mix the coriander with all the other ingredients up to and including the salt. Drizzle the coriander dressing over the vegetables.