Middle Eastern roast chicken with saffron couscous

Ingredients

• 1 large chicken ((about 1.5 kg/3 lbs))
• 1 lemon (zest grated and juiced)
• 1 tbsp honey
• 2 tbsp olive oil
• 1/2 tsp ground ginger
• 1/2 tsp ground cinnamon
• 1 tsp ground cumin
• 3 small red onions (each cut into six wedges)
• 1 2/3 cups couscous
• 1/4 tsp saffron threads
• 2 cups diluted salt-reduced or homemade chicken or vegetable stock (hot)
• 1/3 cup dried figs (coarsely chopped)
• 1/3 cup shelled unsalted pistachios (coarsely chopped)