main course       
noun [ C ] uk/ˌmeɪn ˈkɔːs/ us/ˌmeɪn ˈkɔːrs/
A2 主菜
the largest or most important part of a meal in which there are different parts served separately
  I had salmon for my main course. 我主菜吃了鲑鱼。 
 - More examples
 - We had fish for our main course.
 - I didn't want to eat a main course.