Pineapple-tomato soup is best enjoyed on a chilly evening, surrounded by the golden glow of Saigon 39's neon lighting. The fragrant brew, with chunks of pineapple and tomato and bits of cilantro floating in its sweet-and-sour broth, is one delicious way to warm the soul. It's better than a down comforter, a space heater, woolen socks, fuzzy earmuffs or bunny slippers.