Chicken with almonds and date sauce

Ingredients

• 1 tablespoon olive oil
• 1 large_piece (200g) brown onion, sliced thinly
• 1 1/2 teaspoon ground cinnamon
• 2 teaspoons orange rind, finely grated
• 1/4 teaspoon cayenne pepper
• 1 1/2 cup (375ml) chicken stock
• 1/2 cup (70g) seeded dates, chopped coarsely
• 1 large_piece (900g) barbecued chicken, quartered
• 1 cup (250ml) orange juice
• 1 cup (250ml) water
• 2 cups (400g) couscous
• 20 grams butter
• 1/4 cup (35g) roasted slivered almonds