In a large bowl, cream together shortening, water and sugars.
Add eggs one at a time, beating well after each one.
Add molasses and vanilla.
In a separate bowl, combine flour, ginger, baking soda, cinnamon, cloves and salt.
Add dry ingredients to wet mixture and stir until combined.
Roll dough into 1-inch balls and place on ungreased baking sheets.
Bake for 12-15 minutes or until cookies are set up; let cool completely.
To make the frosting, beat shortening in a large bowl until light and fluffy.
Beat in eggnog, vanilla extract and powdered sugar until light and fluffy.
Spread on cooled cookies and serve.
Notes
In order for these cookies to have the perfect texture, you are going to want to store them in an airtight container for 4-5 days preferably with the bottoms to the cookies pushed together to form almost like a cookie sandwich.