12 ounces rhubarb, sliced diagonally into 2-inch pieces
1 (3-inch) piece ginger, peeled, thinly sliced
3/4 cup sugar
1/2 vanilla bean, split lengthwise
Ice cream or shortbread (for serving)
PRÉPARATION
Preheat oven to 350°F. Place rhubarb and ginger in an 8 x 8-cm baking dish; sprinkle with sugar and scrape out the seeds from the vanilla bean; reserve the bean for another use. Stir and let stand until the rhubarb releases some juice, 20 to 25 minutes.
Roast the rhubarb, stirring once, until tender and the juices are syrupy, 20 to 25 minutes. Let cool slightly.