Plum Puff Dumplings - Brennans Market

Ingredients

• 1 14 oz package all butter puff pastry, thawed and cold
• 5 large purple plums, cut into 1/2 inch wedges
• 1/4 cup sugar, plus more for sprinkling
• 1 1/2 teaspoon cornstarch
• 1/4 teaspoon ground cardamom
• 1 large egg, beaten