燒 is roast, and 味 is flavor or aroma, so 燒味 is roast flavor. 飯 is rice, so 燒味飯 is roast flavor rice.
About This Dish
Siu mei, Cantonese-style roasted meats (basically Cantonese BBQ), served on steamed rice, usually with a vegetable such as bok choy or Chinese broccoli.