Pecan Cream Cheese Christmas Cookies

Ingredients
1 cup butter, softened
1 (8 oz) package cream cheese, softened
1 cup granulated sugar
1 egg
1 teaspoon vanilla extract
2 1/2 cups all-purpose flour
1/2 cup chopped pecans
1/2 teaspoon salt
1 (2.25 oz) container green sugar crystals
1 (2.25 oz) container red sugar crystals
1 cup pecan halves
Preparation