Peel and finely chop the onion. Peel garlic and chop finely. Clean, wash and finely dice the carrots. Clean, wash and halve the tomatoes. Heat oil in a pot, turn tomatoes briefly in it, take them out again and put them aside covered. Add onion, garlic and half of the carrots and fry briefly. Add peas, deglaze with broth, bring to the boil, cover and cook over medium heat for about 1 1/4 hours.
In the meantime wash parsley, dab dry and chop finely. Put the rest of the carrots in boiling salted water and cook for about 5 minutes. Pour into a sieve and drain. Puree the soup with a blender. Season to taste with salt and pepper. Add tomatoes, carrot cubes and sausage slices and bring to the boil again briefly. In deep plates, sprinkle with parsley and serve garnished with mint to taste