In a skillet with a tight-fitting lid, heat the EVOO, 2 turns of the pan, over medium-high heat. Add the chicken and cook until lightly browned, 3 to 4 minutes. Add the onion, zucchini, garlic, lemon peel, crushed red pepper, fennel seeds and cinnamon; season with salt and pepper. Cook for 5 minutes, then add the olives and cook for 3 minutes more.
Stir in the chicken broth and bring to a boil. Stir in the couscous, cover the pan, turn off the heat and let stand for 5 minutes. Fluff with a fork and add the parsley, mint and lemon juice; toss.