Method

1. Chop all vegetables
2. Add the onions, leeks, garlic, peppers and courgettes to a large heated saucepan
3. Add the tomatoes, puree and ketchup and mix well
4. Rinse and drain the chick peas and add to the pan
5. Cover, bring to the boil and then simmer gently for 20 to 30 minutes, stirring occasionally until cooked
6. Remove the lid and increase heat for 10 minutes
7. Stir in the olives and herbs, then season with black pepper