How to understand どのメニューも工夫されたものばかりです


From chapter 25 of 新标准日本语中级, titled 創作中華料理コンテストの実現:

> 野田：おかげさまで、今回の創作中華料理コンテストには、全国から１００００件を超す応募がありました。創作カクテル部門にも１０００件以上の応募がありました。  
>  大山：本当ですか。それはすごい。  
>  野田： **どのメニューも工夫されたものばかりです** 。

If どのメニュー takes the _ga_ (nominative)-case, the meaning seems to be

> Every menu is just a devised thing.

which is weird to me.

If どのメニュー takes the _ni_ (locative)-case (i.e. =どのメニューにも), it gets more
understandable to me as

> On every menu there are all devised things.

Is this sentence in the latter case?




I think you are missing どの correlates with ばかり, which means _every single..._.

メニュー does take the nominative, but if you drop どの, then it should also drop
ばかり and will be something like

  * (この)メニューは工夫されたものです.

which means _this menu is a devised thing_ or more understandably _this menu
has an element of invention in it_. (Note there is not _just_ ).

The original sentence translates to _Every single menu has an invention in
it_. Your sentence would render like どのメニューにも工夫があります, which basically means
the same thing as the original.




I think you are missing どの correlates with ばかり, which means _every single..._.

メニュー does take the nominative, but if you drop どの, then it should also drop
ばかり and will be something like

  * (この)メニューは工夫されたものです.

which means _this menu is a devised thing_ or more understandably _this menu
has an element of invention in it_. (Note there is not _just_ ).

The original sentence translates to _Every single menu has an invention in
it_. Your sentence would render like どのメニューにも工夫があります, which basically means
the same thing as the original.

