Add the sugar and molasses and mix well. Heat this mixture over low heat for 3-4 minutes, stirring often. Don't let the mixture boil. You're just letting it heat through well.
Sift the flour, baking soda, nutmeg, salt and ginger together in a large mixing bowl.
Slowly pour the melted shortening mixture into the flour mixture, stirring constantly using a large spoon. Mix thoroughly. Use your hands to mix the last bit of flour in if necessary.
After it is thoroughly mixed, roll out the dough to about a 1/4 inch thickness directly on an ungreased cookie sheet. Use cookie cutters to cut gingerbread men, Christmas shapes, or make a gingerbread house. Remove the excess cookie dough and put it back in the bowl. Do not move the shapes after you cut them or it will cause them to be misshapen.
If the dough gets too hard to reroll, place the bowl in the microwave for 15-30 seconds, or until the dough becomes soft and warm again.
Bake at 375 degrees Fahrenheit for 12-13 minutes. Allow the cookies to cool on the baking sheet for 5 minutes, then move them to a flat surface to cool completely.
If desired, melt the semi-sweet chocolate in a double boiler or in the microwave. Dip each cooled cookie partially into the melted chocolate and place it on a piece of waxed paper. Sprinkle immediately with Christmas themed sprinkles, if desired.
Allow the chocolate to set, then store the cookies in an airtight container.
Notes
The calories shown are based on the recipe making 36 cookies, with 1 serving being 1 cookie. Since different brands of ingredients have different nutritional information, the calories shown are just an estimate.