Roughly grate the carrots, finely chop the parsley and put both in a bowl.
Whip the orange juice (possibly from 2 oranges), yoghurt and oil together, season the dressing with salt, pepper and agave syrup, pour over the carrot and parsley mixture and mix everything well. The salad should be nice and juicy, so add either orange juice or yogurt again.
Scatter the hazelnuts on top and decorate with a parsley leaf.