In a large bowl, dissolve yeast in 1/2 cup warm water. Add 1 tablespoon sugar; let stand for 5 minutes. Add the remaining warm water and sugar. Beat in the oil, salt and 4 cups flour until smooth. Stir in enough remaining flour to form a soft dough.
Turn onto a floured surface; knead until smooth and elastic, about 6-8 minutes. Place in a greased bowl, turning once to grease top. Cover and let rise in a warm place until doubled, about 45 minutes.
Punch dough down. Turn onto a lightly floured surface; divide into 18 pieces. Shape each into an oval. Place 2 in. apart on greased baking sheets. With a scissors, cut a 1/4-in.-deep slash across the top of each. Cover and let rise until doubled, about 20 minutes.
Bake at 400° for 13-18 minutes or until golden brown. Remove from pans to wire racks to cool.