Coat Dutch oven or large, heavy pot with cooking spray. Cook chicken pieces over medium heat, turning frequently, until they begin to brown, With a slotted spoon, remove the chicken to medium bowl and set aside.
To same pot, add onion, garlic, oil, and 2 tablespoons broth. Stir up any browned bits from bottom of pot. Cook over medium heat, stirring frequently, 5-6 minutes or until onion is tender. If liquid begins to evaporate, add more broth.
Return the chicken to the pot. Add remaining broth, green pepper, tomato, garbanzos, raisins, bay leaf, thyme, cumin, allspice, cloves and black pepper. Bring to a boil, reduce heat, and simmer, covered, 20-25 minutes or until chicken is tender. Remove bay leaf and discard.
Add couscous and stir to mix well. Boil 2 minutes, covered. Remove pot from heat; stir up any couscous sticking to bottom. Allow mixture to stand 10-15 minutes, covered. Add salt to taste, if desired.
Arrange couscous on serving platter and top with chicken and sauce. Garnish with parsley.