Spiced tomato, chickpeas and couscous soup

Ingredients

• 1 tbs olive oil
• 1 onion, chopped
• 2 carrots (about 200 g in total), diced
• 3 stalks celery , diced
• 2-3 tbs harissa*
• 1 tsp cumin
• 700 ml vegetable stock from 1 cube
• 400 g chopped canned tomatoes
• 2 tbs tomato purée
• 400 g canned chickpeas, washed and drained
• 2 tbs couscous
• ½ small bunch parsley , chopped
• Harissa:
• 10-12 dried red chili peppers
• 3 cloves garlic, minced
• 1/2 tsp salt
• 2 tbs olive oil
• 1 tsp ground coriander
• 1 tsp ground caraway seeds
• 1/2 tsp cumin