Heat oil in a saucepan over medium heat. Add onion and cook until soft and translucent, about 5 minutes. Stir in apricots and rhubarb. Cook for 2 more minutes.
Mix in couscous, chicken stock, salt, cumin, ginger, cardamom, allspice, cinnamon, cayenne, and cloves - mixture will be thick. Stir and bring to a boil. Cover and remove from heat.
Let sit for 10 minutes until all the liquid is absorbed.