Heat oven to 400°F.Combine all tart shells ingredients in bowl. Beat at medium speed, scraping bowl often, until mixture resembles coarse crumbs.
Press 1 tablespoon mixture into each cup of mini muffin pans to form 36 (1¾ to 2-inch) shells. Bake 7-10 minutes or until very lightly browned. Remove from oven.
Reduce oven temperature to 350 degrees
Combine all filling ingredients except chopped pecans and pecan halves in 2-quart saucepan. Cook over medium heat, stirring occasionally, 4-5 minutes or until mixture comes to a full boil. Remove from heat; stir in chopped pecans.
Spoon filling into baked shells; top each with pecan half. Bake 5 minutes. Cool 20 minutes in pans; remove to cooling rack.
Recipe by Farm Girl Cook'n at https://farmgirlcookn.com/christmas-cookie-exchange-cookie-1/