I am re-doing this lesson because in an earlier question, Duo would not accept 'dishes' as a translation for 'les assiettes'. I believe 'dish' would be more natural here...? ('Dish' in the sense of container rather than recipe).
"some rice" should be ok too. In english we don't always use the partitive article but the meaning is the same contains rice, contains some rice ... in french it is always required but the translation can leave it out (and sometimes it is more natural to leave it out).