Lebanese Couscous

Name: Lebanese Couscous
Cuisine: Middle Eastern
Ingredients: 1 whole chicken (about 1.5 kg), cut into pieces; 1 large onion, quartered; 2 cinnamon sticks; 2 bay leaves; 5-6 whole cloves; 1 tsp allspice; Salt and black pepper to taste; 8 cups water; For the Moghrabieh; 2 cups moghrabieh (Lebanese couscous pearls); 2 tbsp olive oil; 2 large onions, thinly sliced; 1 tsp ground cumin; 1/2 tsp ground cinnamon; 1/2 tsp ground allspice; 2 cups chicken broth (reserved from cooking the chicken); 1 can (400g) chickpeas, drained and rinsed; Salt and pepper to taste; 2 tbsp butter