Combine 4 cups flour, yeast, and salt in a large mixing bowl; stir well. Gradually add water to flour mixture, stirring well. Add butter; beat at medium speed of an electric mixer until blended. Gradually stir in enough remaining flour to make a stiff dough. Turn dough out onto a floured surface, and knead until smooth and elastic (about 4 minutes). Place in a well-greased bowl, turning to grease top. Cover and let rise in a warm place (85 degrees), free from drafts, 1 hour or until doubled in bulk. Punch dough down, and divide into 10 equal portions. Shape each portion into a ball, and place on a lightly floured surface; let rest 10 minutes. Roll each ball to a 25 cm round on a lightly floured surface, rolling only enough to bake at one time. Chill extra dough to slow down the rising process as you await oven space. Place rolled rounds on lightly greased baking sheets. Brush lightly with cold water, and sprinkle lightly with sesame seeds. Prick entire surface with fork. (Do not allow to rise.) Bake at 180ºC or 25 minutes or until lightly browned and crisp. Remove from pans, and let cool on wire racks. Repeat with remaining balls of dough. Bread-Part 2. ----