Your restaurant has what special dish?
In English, it’s normal to say ‘Do you have any ……?’ For example:
Do you have any question?
Do you have any idea?
Does your restaurant have any special dish?
In Mandarin, we will use a different way to say it: ‘You have what ….?’ For example:
You have what question?
You have what idea?
Your restaurant has what special dish?
Here is a mistake of a student:

He wrote: Do you have any special dish in your restaurant?
Nǐmēn zài nǐmēn de cāntīng yǒu rènhé zhāopáicài ma?
你们在你们的餐厅有任何招牌菜吗?
The correct sentence : Your restaurant has what special dish?
nǐmēn de cāntīng yǒu shénme zhāopáicài ?
你们的餐厅有什么招牌菜?