Heat a dry frying pan over a medium-high heat, add the rice and toast, shaking the pan occasionally, for 2 minutes, or until the rice is deep golden brown, but not burnt. Remove from the heat and leave to cool.
Using a pestle and mortar, grind the toasted rice as finely as you can until you reach the consistency of coarse sand grains. Don’t be tempted to use a spice or coffee grinder, as it will produce way too fine a powder.
For the dressing, whisk the lime zest and juice and sugar together with a fork in a small bowl until the sugar has dissolved. Then add the remaining dressing ingredients, season with salt and pepper and mix well.
Mix all the salad ingredients together in a large bowl, pour the dressing over and mix again until evenly dressed.
Sprinkle with the toasted rice and serve.