This classic Spanish dish orginated in Valencia, where it is traditionally made with rabbit, chicken, and snails. The contemporary version here is filled with delectable vegetables, sausage, and shellfish--but the real treat in either case is the rice. It soaks up the flavors of all the ingredients, including onion, garlic, tomatoes, smoked paprika, and a saffron-scented mixture of stock and wine. Cooked in a large, wide pan, paella makes the perfect dish for entertaining. Just place the pan in the middle of the table so guests can help themselves, and pour a chilled Spanish rosé.