Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
     1/2  cup           onion -- chopped
     1/2  cup           leeks -- thinly sliced
   2      tablespoons   olive oil
     1/2  cup           dry white wine
   1      teaspoon      salt
     1/4  teaspoon      pepper
   1      clove         garlic -- crushed
   1      19 ounces ca  tomatoes
     1/4  cup           butter or margarine
   1      pound         package frozen flounder
                        -- fillets -- defrosted and
                        -- coarsely cut up
  12                    clams -- well washed
   1      pound         package frozen cod fillets
                        defrosted and coarsely cut
   1                    frozen lobster tail
                        defrosted and sliced
   1      teaspoon      flour
   2      tablespoons   water
   2      tablespoons   parsley -- coarsely chopped

Preparation:

Put onions, leeks and oil in a large, heavy saucepan. Cook slowly until onions are tender but not brown. Add wine, salt, pepper, garlic and tomatoes. Cook over low heat for 10 minutes. Heat butter in a skillet; add flounder, clams in shells, cod and lobster. Cover and cook slowly for 15 minutes. Blend flour and water. Stir into the tomato sauce. Add fish; heat. Serve in bowls sprinkled with parsley.