Meanwhile, soften yeast in lukewarm water and add to cooled mixture. When shortening begins to congeal again, the mixture is cool enough. Gradually add flour until it makes very thick dough that is difficult to stir. Turn out on a floured surface, using some of the allowed flour. Knead lightly for 1 to 2 minutes. Return to greased or oiled bowl and place in a warm place to let rise until doubled in bulk; at least an hour. Return to floured surface and divide in to 3 equal pans. Set in a warm place to rise again; at least for an hour or until doubled.
Bake 45 min. to one hour at 375 degrees. (depending on pan) remove immediately and put on racks to cool.