Cinnamon sugar palmiers

Name: Cinnamon sugar palmiers
Yield: Makes 18 palmiers
Cuisine: French
Ingredients: ¾ teaspoon ground cinnamon; Pinch of fine sea salt; 250 g (9 oz) all-butter puff or rough puff pastry; 100 g (3½ oz) caster sugar; 6 green cardamom pods, seeds ground