Step 1

Cook beans in large saucepan of boiling salted water just until crisp-tender, about 2 minutes. Drain.

Step 2

Heat oil in heavy large skillet over high heat. Add chicken, onion and garlic; stir-fry until chicken is partially cooked, about 4 minutes. Add lemongrass and next 4 ingredients; stir 2 minutes. Add beans, stock and oyster sauce; reduce heat and simmer until sauce thickens and chicken is cooked through, about 4 minutes longer. Season with salt and pepper.

Step 3

*Available at Asian markets and in some supermarkets.