Seared fruits are simple, healthful accompaniments to roasted meats; use slightly overripe fruit.
Preheat the oven to 400 degrees.
In a bowl, combine all of the ingredients and set aside for 10 minutes.
Heat a nonstick ovenproof skillet over medium heat, add the plum mixture, and cook 30 seconds to 1 minute, until the surface of the plums are seared and caramel-colored.
Transfer the plums to the oven and bake for about 10 minutes, or until the plum skins are just beginning to break and the color is vibrant.