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["turn oven on to the ""warm"" setting", "Grease large ovenproof glass bowl and set aside.", "Melt margarine with 1 cup water in small saucepan over low heat.", "Let cool to lukewarm.", "Place 2 cups flour in large bowl of electric mixer and make a well in center.", "Combine sugar, yeast and salt in well.", "Add melted margarine mixture.", "Using dough hook, blend at low speed until thoroughly combined, 2 to 3 minutes.", "Add 4 eggs and additional egg yolk, one at a time, blending well at medium low speed after each addition.", "Continue mixing until dough resembles thick batter, about 7 minutes.", "Blend in 3 cups flour, 1/4 cup at a time, mixing at low speed until dough is heavy and sticky and pulls away from sides of bowl, about 7 minutes.", "Sprinkle remaining 1/2 cup flour on work surface and knead until smooth and elastic, about 5 minutes.", "(Dough will be sticky.)", "Transfer dough to prepared ovenproof glass bowl, turning to coat entire surface.", "Pour boiling water into medium ovenproof glass bowl.", "Set bowl with dough atop; do not allow bottom of large bowl to touch boiling water.", "Cover dough with cloth and let rise in warm draft-free area until doubled in volume, 40-50 minutes", "Grease 2 baking sheets, or two 9x5 inch loaf pans, or 1 of each", "Divide dough in half.", "Separate each half into thirds.", "Rollinto ropes 12 to 13 inches long.", "Make 2 braids with ropes, tucking ends under.", "Transfer loaves to prepared pans.", "Pour boiling water into 2 medium ovenproof glass bowls.", "Arrange pans with loaves over water.", "Cover; let rise in warm draft-free area until doubled, about 30 minutes.", "Remove loaves from over water.", "turn oven to 400 degrees", "Bake until golden, about 15 minutes", "Combine egg white and 1/2 teaspoon water; brush over loaves.", "Continue baking until browned, 8 to 10 minutes.", "Turn loaves out onto racks and cool slightly.", "Serve warm or allow to cool, wrap with plastic and store at room temperature", "enjoy!"]