side dish  
noun [ C ] uk/ˈsaɪd ˌdɪʃ/ us/ˈsaɪd ˌdɪʃ/
  (PLATE OF FOOD)     
  UK (also side order); (US informal side)(餐馆的)配菜,附加菜 
in a restaurant, an extra dish of food, for example vegetables or salad, that is served with the main dish, sometimes on a separate plate
   (PLATE)     
 mainly UK放配菜的盘子 
a plate on which a side dish is served