04Crushed tomatoes are available in cans. If whole tomatoes are used, crush them using a food processor or electric blender, if desired. Add the tomatoes to the meat and mushroom mixture. Add broth. Cook, stirring occasionally, about 20 minutes.05Cook the tortellini according to package directions, about 8 minutes. Drain but reserve one cup of the cooking liquid. Combine the cooked tortellini with the meat sauce, the reserved cup of cooking liquid and the butter. Toss to blend. Serve with grated Parmesan cheese on the side.