Sweet soy sauce, sometimes called kecap manis, is a thick dark sauce typically used in Indonesian and Chinese cooking. It can be found in Asian groceries. To make your own, simmer equal parts soy sauce and brown sugar or molasses until thickened. Chinese broccoli or gai lan is a dark green leafy vegetable with thick stems and small flower heads similar in appearance to broccoli. Its flavor is stronger than broccoli and faintly bitter.