The Missionaries of Charity, Mother Theresa's order of nuns, are the motors that run this convent, also a home for battered women and the best soup kitchen in town. On any given day except Thursday (cook's day off), 250 homeless people eat a hearty breakfast or a full-course meal in the cafeteria at the home, one of many throughout the world. Doors are open to the down-and-out denizens of Miami from 8:30 to 11:30 a.m. Three long tables and 180 chairs await the tired, strung out, and hungry. Maria, a 38-year-old woman who's been homeless for two years, says she normally eats at Camillus House, but "I come here just for the spaghetti. It's first-class." At 4:00 p.m. domestic-violence victims can have dinner from the good mother's kitchen.