1. Drain pineapple; reserve 2/3 cup juice. Pat pineapple chunks dry.
2. Mix brown sugar, cinnamon, walnuts and butter in medium bowl; set aside.
3. Beat reserved juice with baking mix, granulated sugar and egg in large bowl for 30 seconds. Spoon into 9-inch round baking pan sprayed with vegetable cooking spray. Top with half of walnut mixture, then pineapple and then remaining walnut mixture.
4. Bake at 400°F for 20 to 25 minutes. Cool.