Dissolve yeast in warm water; set aside. Scald milk & pour over sugar, salt & shortening in a large bowl. Cool. Add 2 c. flour & eggs, and beat well. Add yeast, spices and remaining flour to make a soft dough. Let rise until double in size, about 1 hour.
Divide into 2 parts; roll each part into a rectangle about 1/4 inch thick. Brush melted butter over the dough. Sprinkle generously with a cinnamon-sugar mixture* then add nuts and/or raisins if desired. Roll lengthwise as for jelly roll. Cut into 1/2 inch pieces. Put on greased baking sheet; allow to rise again, about 1 hour. Bake at 350 for about 20 minutes.
* This mixture is a ratio of about 1 teasp. Cinnamon for every 1 Tablesp. Sugar. Cover well, as this makes the filling in the rolls.