In a large bowl, cream butter and brown sugar until light and fluffy, 5-7 minutes. Add egg and molasses. Combine the flour, ginger, baking soda, cinnamon, cloves and salt; gradually add to creamed mixture and mix well. Cover and refrigerate until easy to handle, about 4 hours or overnight., Preheat oven to 350°. On a lightly floured surface, roll dough to 1/8-in. thickness. Cut with floured 2-1/2-in. cookie cutters. Place 1 in. apart on ungreased baking sheets. , Bake until edges are firm, 8-10 minutes. Remove to wire racks to cool completely. Tint some of the frosting red and some green; leave remaining frosting plain. Decorate cookies.