Place a wok over high heat until hot. Add oil, swirling to coat sides. Add garlic and ginger; cook stirring, until fragrant, about 10 seconds. Add carrots, lotus root, jicama, zucchini and mushrooms; stir fry for 1 minute.
Add water, cover and cook for 3 minutes. Add bell pepper and asparagus; stir fry for 1 minute. Add sauce and bring to a boil. Add cornstarch solution and cook, stirring, until sauce boils and thickens.