This recipe is a bit different from rtebalt's and perfect for just two people...
Cioppino for Two
2 tablespoons extra-virgin olive oil
2 tablespoons unsalted butter
1/2 small onion, peeled and chopped (about 1/2 cup)
1 small carrot, peeled, trimmed, and chopped (about 1/4 cup)
1/2 rib celery, chopped (about 1/4 cup)
1/2 small fennel bulb, trimmed and chopped (about 1/2 cup)
1 small clove garlic, peeled and minced or pressed
1 tablespoon tomato paste
1/2 cup dry white wine
1 14-ounce can diced tomatoes
1 cup seafood stock or water
1 bay leaf
1/4 teaspoon dried oregano
1/4 teaspoon dried thyme
1/4 teaspoon dried basil
2 pinches cayenne
Kosher salt and fresh ground black pepper
2 tablespoons licorice liqueur
4-6 ounces firm white fish such as grouper, cod, halibut or snapper
4-6 ounces shellfish such as peeled medium shrimp or shelled crabmeat
6-8 mussels or small clams
1-2 tablespoons chopped fennel fronds or parsley (or a combination)
2 large dry sea scallops
2-3 tablespoons vegetable oil
Heat the olive oil and butter in a heavy medium-sized soup pot or saucepan. When the butter stops foaming, add the onion, carrot, celery and fennel. Sprinkle with salt. Stir and cook for 5 or 6 minutes, until vegetables have begun to soften and brown a little. Add the garlic and stir in, cooking for another minute or so.
Add the tomato paste and stir, using the back of the spoon to break the paste apart and coat the vegetables as much as possible. Cook for a few minutes, until the tomato paste begins to darken slightly.
Add the wine and stir, scraping up any browned bits from the bottom of the pot. Bring to a boil and cook until most of the wine has evaporated.
Add the tomatoes (with liquid), stock or water, herbs and cayenne. Stir and taste for seasoning, adding salt and black pepper if necessary. Reduce heat and simmer soup for at least an hour. (Soup base can be made ahead to this point and refrigerated or frozen.)
About 15 minutes before serving, bring the soup back to a simmer (if necessary). Cut the fish into chunks about 2 inches by 1 inch. Scrub the mussels and clams.
Turn the heat up to medium high. Add the mussels and clams and cover the pot. Cook for about 5 minutes, or until the shells have opened.
Turn the heat back down to a simmer and add the fish. Cook for one minute, and then add the shrimp and crab. Cook for 2 minutes or just until shrimp are done and crab is warmed through. Ladle into large soup bowls and sprinkle with parsley. Serve immediately if not using scallops.
If using the optional scallops, sprinkle with salt. Just before adding the clams and mussels to the pot, heat a small skillet over medium high heat. Pour in enough oil to form a thick coat of oil on the bottom. Just when oil begins to smoke, turn down the heat slightly and add the scallops. As the mussels and clams steam, cook the scallops for 2-3 minutes, until deep golden brown. Turn them over and cook the other side for a couple of minutes. Remove to a small plate. When soup is ready, ladle into shallow soup bowls and place a scallop in the center of each bowl. Sprinkle with parsley or fennel fronds and serve.
Obviously, this not the fastest recipe on the block, but it is quite impressive...