The stir-fried vegetables are best eaten as soon as they are made.
In a large wok, heat the oil over medium heat. Add the garlic and ginger and sauté for 30 seconds, or until fragrant and tender. Add the bok choy and carrots and stir for 5 to 10 minutes, or until the green parts of the bok choy have wilted and the white parts are crisp-tender. Season to taste with salt.
Divide the vegetables evenly among 4 plates and serve.