In a large skillet, cook the bacon over medium heat until crispy, about 10 minutes, turning occasionally. Drain the bacon on paper towels. Pour off [and reserve] all but 2 tablespoons of the bacon fat in the skillet. Add the garlic to the pan; cook for about go seconds, stirring occasionally. Add the spinach; cook until the spinach is wilted, 1 to 2 minutes, stirring constantly. Place the spinach mixture in a medium bowl. Add the raisins and 1/8 teaspoon of pepper. Finely chop the bacon and add it to the bowl. Stir the mixture and allow it to cool to room temperature.