In a saucepan with a tight lik, heat the olive oil. Add the onions and red peppers, and cook and stir until wilted. Do not brown. Add the water, raisins, cinnamon, cumin, orange rind, salt and pepper. Bring to a boil. Remove from the heat, add the couscous and stir well. Cover and let stand for 5 minutes. Uncover, add the butter and fluff well with a fork.