Chop 1/4 cup each of the coriander and parsley; set aside. Tie together remaining coriander and parsley and place in large saucepan. Add stock and bring to boil. Reduce heat to low; cover and simmer for 15 minutes. Discard herb bundle. Add lentils; cover and simmer for 15 minutes.
Add chickpeas, tomatoes, onions, cinnamon, cumin, ginger, turmeric and pepper; cover and simmer for 30 minutes.
In food processor or blender, purée 3 cups of the soup. Return to pot and heat through. Stir in lemon juice, oil and reserved chopped herbs.
GARNISH: Ladle soup into bowls. Sprinkle with cinnamon; top with lemon slices and dates.