Combine yeast and warm water in a 1-cup liquid measuring cup; let stand 5 minutes.
Combine yeast mixture, 2 cups flour, and next 4 ingredients in a large bowl; beat with a wooden spoon 2 minutes. Gradually stir in enough remaining flour to make a soft dough. Cover and let rise in a warm place (85), free from drafts, 1 hour.
Punch dough down; cover and chill at least 8 hours.
Punch dough down; turn out onto a lightly floured surface, and knead 3 or 4 times. Divide dough in half; shape each portion into 16 (2-inch) balls.
Place balls in two 9-inch square pans coated with cooking spray. Cover and let rise in a warm place (85), free from drafts, 1 1/2 hours or until dough is doubled in bulk.