Using the same wok sauté a pinch of ginger and garlic in 1 tablespoon of cooking oil till golden brown. Add water to the wok and bring to a quick boil. Season with salt and ground pepper to taste. Add the cornstarch diluted in water. Simmer for few minutes.
Add the sautéed vegetables mixture into the sauce. Bring to a quick boil and remove from heat. Transfer in a serving dish and serve. Enjoy!