1. In large bowl, combine sugar, salt, yeast, and 2 cups flour. In 1-quart saucepan over low heat, heat butter or margarine and 1 3/4 cups water until very warm (120 ° to 130 ° F.) (Butter or margarine does not need to melt.)
2. With mixer at low speed, gradually beat liquid into dry ingredients until just blended. Increase speed to medium; beat 2 minutes, occasionally scraping bowl with rubber spatula.
3. Beat in 1/2 cup flour to make thick batter; continue beating mixture at medium speed for 2 minutes, scraping bowl often with rubber spatula. With wooden spoon, stir in enough additional flour (about 1 3/4 cups) to make a soft dough.
4. Turn dough onto floured surface; knead until smooth and elastic, about 10 minutes, adding flour while kneading.
5. Cut dough in half; cover pieces with bowl; let dough rest for 20 minutes for easier shaping.
6. Grease large cookie sheet; sprinkle cookie sheet with cornmeal.
7. On floured surface with floured rolling pin, roll each half into 15" by 10" rectangle. From 15" side, tightly roll dough, jelly-roll fashion; pinch seam to seal.
8. Place loaves, seam side down, on cookie sheet and taper ends. Brush loaves with oil; cover loosely with plastic wrap; Refrigerate 2 to 24 hours.
9. Preheat oven to 425 ° F. Meanwhile, remove loaves from refrigerator; uncover; let stand 10 minutes. Cut 3 or 4 diagonal slashes on top of each loaf. Bake 20 minutes.
10. In small bowl with fork, beat egg white with 1 tablespoon of water. Remove loaves from oven; brush with egg-white mixture; return to oven and bake 5 minutes.
Contributed by Wesley ("Ain't no beans in *My* chili") Pitts