Sarsuela is a seafood medley and is the variety show of Catalan food. It can contain any combination of different types of white fish, prawns, shrimp, squid, mussels, clams, crayfish or lobster with lots of fresh herbs like oregano, thyme and marjoram. All of these ingredients are combined in a casserole with olive oil, tomato, lemon, paprika, white wine, sherry and other spices. Yum.