Peel and wash the carrots and potatoes. Finely dice one third each, the rest of the carrots and potatoes are coarsely chopped. Wash and quarter the tomatoes. Core half, dice finely and put aside. Cut the rest of the tomatoes into large pieces
Cook the carrot and potato cubes in 1 3/4 l boiling water for about 5 minutes. Lift out, drain. Dissolve stock in hot vegetable water. Cook coarse pieces of tomatoes, potatoes and carrots for about 20 minutes.
Rinse the prawns, dab dry. Fry in hot oil for about 2 minutes. Season with lemon and salt. Puree the vegetables in the broth. Add cream, bring to the boil briefly. Season to taste with salt and pepper. Add shrimps and all fine vegetable cubes to the soup