To form tart shells: Invert Kinnikinnick pie shells and remove foil. Thaw on parchment paper. Roll out each pie shell slightly with a rolling pin and cut into 2 1/2 inch circles. Form into tart foils. Re work scrap pie dough to form remaining tarts. Place tart foils on cookie sheet and partially bake for 10 minutes at 375° F (190°C), set aside to cool.
In a bowl combine slightly beaten eggs, butter, vanilla and brown sugar. Mix for 3-4 minutes until light and fluffy.
Divide raisins into base of prepared tart shells and fill with filling. Bake at 375°F for 15 minutes. Yields 18 Tarts