Heat the canola oil in a large skillet or wok over high heat. Add the garlic and ginger and cook for 30 seconds. Add the vegetables and cook until the vegetables are heated through, 3 to 4 minutes. Add the soy sauce and scallions and cook for another 3 minutes. Add the noodles and sugar and mix well. Taste and season, if needed. Turn off the heat, add the sesame oil and stir. Transfer to platter and serve immediately.