For the cookies,beat the shortening and softened butter at medium speed of an electric mixer until creamy. Gradually add the sugar, beating well. Add the egg, beating well. Add the buttermilk, vanilla, and ground nutmeg, mixing until blended. Combine the flour, baking soda, and salt. Add to shortening mixture, beating well. Cover and chill at least 2 hours. Drop dough by heaping teaspoonfuls onto a lightly greased cookie sheet. For the topping, combine the sugar and ground cinnamon. Sprinkle evenly over the cookies. Bake at 375 degrees for 8-10 minutes. Cool on wire racks.