Sweet potato or sweet potato?

Some sentences may be grammatically correct but difficult to read:  

➤ You need to create a sweet potato dish but not a sweet potato dish.
 
The problem here is 'sweet potato': it can mean a type of potato or potato sweetened. While some may consider it strange to sweeten potato, the confusion creates a possibility; their may be a dish which requires sweetening potato.

By rephrasing, we can improve clarity so the reader does not need to read it two or three time: eliminating 'sweet potato' in one clause allows us to achieve this: 

➤ We are using sweet potatoes to create a savoury dish.  
➤ You need to create a savoury sweet potato dish.

Using savoury helps clarify 'sweet potato'.

Is their another way in which to clarify the sentence?