Non-stick cooking spray
One 1-pound package frozen puff pastry, thawed
1/3 cup cajeta or thick caramel sauce
1/2 cup finely grated Monterrey jack cheese
1/4 cup pineapple, peeled and diced into 1/2-inch cubes (about 1 cup)
2 eggs, beaten and blended with 1 tablespoon water
2 eggs, beaten and blended with 1 tablespoon water
All-purpose flour, for dusting
2 tablespoons demarara or light brown sugar