Clean and wash the tomatoes, carrot and celery. Prick tomatoes toothpick and put vegetables in 500 ml water to boil until the water remains half quantity. Take vegetable broth peel the tomatoes and blend everything. Boil the meat of steam, chop it and add to tomato sauce with olive oil. In a separate pot boil the stars in the rest of the vegetables broth, strain and add to the beef-tomato sauce. Sprinkle with Parmesan.