Heat oven to 350 degrees F.
Spray bottom and sides of loaf pan with cooking spray.
In large bowl, combine flour, pistachios, brown sugar, dried cherries, salt and baking soda.
Stir in milk. Spoon batter evenly into prepared pan. The mixture will be thick.
Bake 60 minutes until golden brown.
After 30 minutes, remove from the pan.
Cool completely on cooling rack.
Transfer to freezer and freeze at least 1 hour, but no more than 3 hours.
Heat oven to 400 degrees F.
Use sharp serrated knife to cut loaf into ⅛-inch thick slices. The semi frozen state of the loaf will help keep the cookie from crumbling while being sliced so thinly.
Arrange slices in single layer on a cookie sheet.
Bake 15 to 20 minutes until golden brown, flipping halfway through baking. Transfer to cooling rack to cool completely.
Store at room temperature in airtight container up to 1 week.