Rosemary is essential in the Italian kitchen. It gives aroma to roasted chicken and roast potatoes, to grilled mushrooms and to pizza bianca, is the basis to every stew or roast, and provides a haunting, aromatic flavor in dishes like these stuffed tomatoes. These tomatoes can be made early in the morning, before the heat of summer or busy schedules interrupt cooking activity. Serve them warm or at room temperature, as they are lovely both ways.