Heat the oil and butter. Add the chopped onion (reserve the green part of the spring onion), stir-fry until transluscent. Add the garlic paste, oregano, salt, green chillies and red chilli flakes stir it in then add the blended tomatoes. Cook for a few minutes until the tomatoes thicken then add the broth/soup.
Once it comes to a boil, add the uncooked pasta directly into it and cook for about 10-12 minutes or until the pasta is tender.
Finally, add the beans and black pepper, then give it a good stir. Adjust seasoning to your taste. You can squeeze in the lemon juice if you like and add the chopped coriander. Garnish with the chopped green part of the spring onion and serve hot with crusty bread on the side. Enjoy! 🙂