Preheat oven to 350°. Line a large rimmed baking sheet with parchment paper. Place cups in even layer on pan.
In a medium bowl, stir together artichoke hearts, garlic, spinach, cheese, mayonnaise, sour cream, cream cheese, salt, and peppers. Divide mixture among cups.
Bake until warmed through, about 12 to 15 minutes. Garnish with black pepper, if desired.
Notes
Kitchen Tip: Make tarts a few days ahead, and store covered in freezer. Bake from frozen before serving.
*We used canned artichoke hearts.
Recipe by Southern Lady Magazine at https://southernladymagazine.com/spinach-artichoke-phyllo-bites-recipe/