1. Chop the onion, carrot & celery. 2. Boil the chicken to make the bouillon. 3. Melt in pot the butter and heat the onion, carrot & celery in it. 4. Add 250 ml of chicken bouillon to the vegetables and boil until the vegetables are almost soft. 5. Add the chicken, the rest of the bouillon and squeeze the lemon juice to the pot. Boil until the vegetables are completely soft. 6. Pour the mixture into the blender and blend it until the consistency is smooth and creamy. 7. Pour the mixture back to the pot, add the cream and boil the soup for a short while. 8. Season with salt and pepper.