Line an 8x8-inch square pan with parchment paper or nonstick aluminum foil.
In a microwave-safe bowl, add the sweetened condensed milk and white chocolate bar pieces.
Microwave on high for 40 seconds, then at 20 second intervals, mixing in between each interval until the chocolate is completely melted.
Add the vanilla extract and salt and mix to combine.
Chop the glazed cherries and mix into the chocolate mixture. Pour the mixture into the lined pan.
Sprinkle the chopped dried cranberries and pistachios on top of the mixture in the pan, press them slightly into the mixture with your fingers.
Put in the fridge to harden for at least 3 hours (or freezer for 1 hour) Cut into small squares and serve!
Notes
White chocolate bars can come in different sizes depending on the brand. You want to make sure that you get 16 ounces total. For example, if you purchase the Great Value White Chocolate Baking Bar (from Walmart) or Ghirardelli White Chocolate Bar - they are exactly 4 ounces each so you'd want to purchase 4 bars (non affiliated links.)