Medley: Steam vegetables until they are tender-crisp (5 minutes). Plunge into cold water to stop cooking & drain well. Transfer to a serving bowl & set aside.
Roast sesame seeds in a small skillet over medium heat, until lightly browned, about 5 minutes. Set aside.
Sauce: Combine all the sauce ingredients in a small bowl. Pour over the vegetables & toss to coat. Sprinkle with the roasted seeds & serve.