Put a large soup pan on medium heat and add some oil. Then add the onions and fry until they look glassy.
Add the lemon harissa, the tomato paste, the kurkuma, cilantro seeds, cumin seeds and the paprika powder and gently stir to mix.
Add the carrot and tomatoes and stir to mix again.
Then add the polpa, vegetable stock, lentils and 800 ml of water.
Let it cook for 15 minutes.
Then use the hand blender to make a smooth soup.