These go well over low-fat ice cream or pound cake.
Preheat oven to 450°.
Place plum halves, cut sides up, in an 11 x 7-inch baking dish coated with cooking spray. Combine orange juice, sugar, cinnamon, nutmeg, cumin, and cardamom, and stir well. Drizzle orange juice mixture over plums. Bake at 450° for 20 minutes. Top with toasted almonds.