Roasted Radishes with Soy and Sesame Seeds

20 medium radishes, leaves, stems and rootlets trimmed (about 1 pound when trimmed)
11/2 tablespoons roasted peanut oil
2 tablespoons soy sauce
2 medium scallions, sliced think
1 tablespoon sesame seeds, toasted in a dry skillet until golden brown

1. Preheat the oven to 425 degrees.
2. Unless very small, halve the radishes lenghwise from stem to root end. Toss them with the oil on a large rimmed baking sheet. Roast, turning once or twice, until the radishes are tender and beginning to brown, about 25 minutes. Remove the radishes from the oven (but do not turn it off).
3. Drizzle the soy sauce over the radishes and sprinkle with scallions. Toss well and continue roasting for 5 minutes longer. Turn the radishes and any juices on the baking sheet into serving bowl. Sprinkle with the sesame seeds and serve immediately.