Mix the sauce

• Stir the oyster sauce, soy sauce, sesame oil and water together in a bowl.

Sear the bok choy

• Heat the vegetable oil in a wok over high heat.
• Add the garlic and fry until fragrant.
• Add the bok choy and stir-fry until the leaves wilt and the stems soften.

Add the sauce and serve

• Pour the sauce over the bok choy and toss to coat.
• Cook until the sauce thickens slightly, then serve hot.