In a large saucepan or wok, heat the oil over high heat until hot but not smoking.
Toss in the vegetables and seasonings and stir-fry for 3 to 6 minutes, stirring 5 to 7 times. The vegetables should be slightly crunchy.If you would like them a little more tender, cook a few minutes longer. Season to taste with salt and pepper. Drizzle over sesame oil, if using. Enjoy!