1 teaspoon ground cinnamon
1 pound short crust pastry, recipe follows
For the pastry: Roll the short crust pastry 1/4-inch thick and cut into 6 (6-inch) rounds.
Special equipment: rolling pin
Preheat the oven to 425 degrees F.
1/4 cup sugar
1/2 teaspoon ground cardamom
1 cup all-purpose flour
6 purple plums, pitted and thinly sliced
1 egg yolk
2 tablespoons water
Refrigerate the pastry rounds for at least 30 minutes. Cut 5 evenly spaced 1-inch slits around the edge of each pastry round (perpendicular to the edge).
1/3 cup brown sugar
1/2 cup unsalted butter, cold