1. Preheat oven to 350°.
2. Combine first 4 ingredients in a medium bowl. Spread evenly into an 8-inch square baking dish coated with cooking spray. Bake at 350° for 30 minutes or until edges are lightly browned and center is almost set. Cool on a wire rack.
3. Cut pudding into 12 equal portions. Pour milk over pudding. Cover and refrigerate 8 hours or overnight. Sprinkle cardamom over pudding. Spoon 1 serving pudding and about 2 teaspoons milk into each of 12 small bowls, and top each serving with 1 teaspoon pistachios.