1/4+cup white sugar
1/2 teaspoon kosher salt
1/4 teaspoon ground cardamom, plus more to serve
1 13 1/2-ounce can coconut milk
1/2 cup Arborio rice, briefly rinsed, then drained
4 inch strip orange zest, white pith removed (see note)
2 teaspoons vanilla extract
1/3 cup shelled roasted, salted pistachios, roughly chopped
Heat the oven to 350°F with a rack in the middle position. In a small bowl, stir together the sugar, salt and cardamom; set aside. In a large (6- to 8-quart) Dutch oven, stir together the coconut milk and 2½ cups water.
Bring to a boil over medium-high, then stir in the rice, sugar mixture and orange zest. Cover and transfer to the oven. Bake until the rice is tender and the pudding is creamy, about 50 minutes.
Stir in the vanilla, transfer to a bowl and cool for 15 minutes. Serve warm or cool completely, cover and refrigerate for up to 3 days (let stand at room temperature for 30 minutes before serving). Sprinkle individual bowls with pistachios and dust with additional cardamom just before serving.