Wash ripe medium-sized tomatoes. Chop off tops and carefully hollow out most of the pulp. Put meat through a meat-grinder and combine well with pre-soaked rice, beaten egg, finely chopped onions, salt and black pepper. Put filling into tomatoes and place open end down on greased layers of a steamer. In the pot under the steamer, place meat bones, bell peppers, tomatoes and carrots to make soup while simultaneously steaming the tomatoes the final 20 minutes.