-peeled and sieved Combine vegetables, dry seasonings and water in a saucepan or pot. Bring to a boil; simmer 20 minutes, then strain. Cook fish in the strained vegetable stock 6 to 10 minutes, or until fish flakes easily. Remove fish from stock. Arrange on serving platter and cover with plastic wrap. Chill. Strain fish stock and reserve 0.75 cup for horseradish sauce; cool. For horseradish sauce, melt the butter in a saucepan, then blend in flour until smooth, making what the French would call a roux. Add the cooked fish stock gradually, stirring constantly. Cook and stir until the sauce boils and becomes thick and smooth. Remove from heat and stir in horseradish, sugar, salt, sour cream and eggs. Cool for 15 minutes. Pour the horseradish sauce over the chilled fish and garnish with shredded lettuce. NOTES: * Fish in horseradish sauce -This recipe is the first of the dozen dishes that make up the traditional Polish Christmas-eve meal, which is eaten after sundown on Christmas eve. The Polish word for Christmas eve is Wigilia (pronounced VI-gee-lee-ah). Its root is like the English vigil: waiting for Christ to be born. At the end of the Wigilia meal the family goes off to midnight mass at church. There are usually dozen dishes in a Wigilia meal to symbolize the dozen apostles, though some families serve 13 because they include Christ in their count. The meal starts when the first star can be seen; this symbolizes the star of Bethlehem. Although The Wigilia is meatless (Advent, the season of penance, continues until midnight), it is still festive and delicious. The tradition of Wigilia, though centuries old, is still current in Poland. There is no fixed set of rules for what the dozen (or 13) dishes must be; the items in the meal change somewhat according to location and availability of ingredients. Nevertheless, all of the dishes are traditional, and in addition there are many traditions for the serving of the meal. For example, some people place straw under the tablecloth to symbolize the manger in which Christ was born. Most families set an extra place, for the stranger who might be passing by. This is my family's traditional Wigilia meal: : Fish in horseradish sauce : Pike Polish style : Pickled beets : Pickled herring in sour cream : Stewed sauerkraut with mushrooms : Christmas eve kutia : Almond soup : Noodles with poppy seed and raisins : Poppy-seed rolls : Christmas bread : Baked apples with red wine : Marzipan : 12-fruit compote With this first recipe you will notice a similarity with my last name. Now you know a word of Polish (namely chrzan = horseradish i.e. hot stuff). : Difficulty: moderate. : Time: 1 hour. : Precision: approximate measurement OK. Experiment. : Original recipe passed down through the generations and translated from Polish into English (with a few mods) by Edward Chrzanowski : MFCF, University of Waterloo, Waterloo, Ontario, Canada : echrzanowski@watmath.waterloo.edu or {ihnp4,allegra,utzoo}!watmath!echrzanowski : Copyright (C) 1986 USENET Community Trust