1. In a bowl, dissolve sugar in warm water then add the yeast.
2. Let the liquid stand for ten minutes or until the yeast becomes foamy and floats to the top.
3. Sift the flour into a bowl. Add the shortening and (1); mix well. If the dough is too dry, add water; if too moist, add flour.
4. Knead the dough with the heels of one or both hands until smooth and elastic.
5. Place the dough in a bowl and cover it with a plastic wrap. Let the dough rise in a warm place for about two hours until it has tripled in bulk.