Add red wine, mix and cook till wine is reduced to one-fourth its original volume. Add half cup chicken stock, mix and reduce again till half. Remove from heat and set aside.
Strain the red wine reduction and add to the flour. Mix well and cook till it thickens. Add the salt and black pepper powder. Mix well, remove from heat and set aside.
Put couscous in a bowl. Heat remaining chicken stock and add to the couscous. Cover and set aside for ten minutes or till the couscous soaks all the stock.
Add raisins and five spice powder to the couscous. Season with a pinch of salt if necessary. Mix well.
Heat some olive oil in a non-stick grill pan. Place the chicken breasts skin side down and cook for two to three minutes on each side. Remove from the pan and cool.
Slice the chicken and serve warm with couscous and red wine jus.