Heat 1 Tbsp oil on medium/high heat. Add the onion and celery cook for 10 minutes. Drop the garlic to the pan and cook it for 1 extra minute.
Stir in the tomato puree, chopped tomatoes, chickpeas and green pea rice. Increase the temperature and once it is boiling turn it down to a medium/low heat and simmer for 6-8 minutes.
Add the remaining 1 tbsp oil and drizzle the pesto over the soup.