http://spanishfood.about.com/od/spanishfoodfaqs/f/faqpaella.htmActually, there are as many versions of paella as there are cooks. It may contain chicken, pork, shellfish, fish, eel, squid, beans, peas, artichokes or peppers. Saffron, the spice that also turns the rice a wonderful golden color is an essential part of the dish.For more on paella, read our article Paella - an Introduction.