Be careful sourcing your orange and olive oil. Many oranges have been sprayed with poisonous pesticides, making the rind unsafe to grate. Choose organic oranges. Carefully pick your olive oil too, as many commercial brands have been adulterated with inferior oils. Buy an organic extra virgin olive oil from a supermarket that traces their sources. No point going to the bother of making this Moroccan olive salad recipe without using an authentic olive oil!