In a large bowl, dissolve the yeast in warm water. Add the sugar and let sit for 5-10 minutes until frothy.
Add the vegetable oil, flour, and salt to the yeast mixture. Mix until a dough forms.
Knead the dough on a lightly floured surface for about 5 minutes, until smooth and elastic.
Place the dough in a greased bowl, cover with a damp cloth, and let rise in a warm place for about 1 hour, or until doubled in size.