White Chocolate and Pistachio Crackers

1. Preheat oven to 350ºF. Line a baking sheet with foil greased with cooking spray. Lay the saltine crackers on the sheet side by side to form a rectangle.
2. In a small saucepan, melt the butter and brown sugar together over medium heat. Evenly pour the mixture over the crackers. Bake for about 7 minutes, or until the butter and sugar are bubbly.
3. Sprinkle on the white chocolate. Spread over the crackers with a butter knife as it melts. Top with the chopped pistachios. Let cool and place in the refrigerator until top hardens. Break into pieces and store in a plastic bag.