Baked Chicken And Vegetable Couscous

Name: Baked Chicken And Vegetable Couscous
Ingredients: CHICKEN AND MARINADE:; 1 lemon; 1 cup nonfat plain yogurt; 1 tablespoon grated fresh ginger; 2 cloves garlic, minced; 1 1/2 teaspoons turmeric; 1 teaspoon ground coriander; 1 teaspoon paprika; 1 teaspoon ground cardamom; 1/2 teaspoon ground cumin; 1/4 teaspoon ground black pepper; teaspoon salt; 4 bone-in, skinless chicken breast halves(about 8 ounces each); ROASTED VEGETABLES:; 4 carrots, cut into 1 pieces; 4 parsnips, cut into 1 pieces; 2 cups peeled and cubed butternut squash; 1 red onion, cut into 1 pieces; salt; ground black pepper; 1 1/2 cups defatted reduced-sodium chicken broth; COUSCOUS:; 2 1/4 cups water; 1 box (10 ounces) couscous