YOU SAID:

I ate the pizza made from a cow that ate my friend

INTO JAPANESE

友達を食べた牛から作られたピザを食べた

BACK INTO ENGLISH

I ate pizza made from a cow that ate my friend.

INTO JAPANESE

友達を食べた牛から作られたピザを食べました。

BACK INTO ENGLISH

I had pizza made from cows that had eaten my friends.

INTO JAPANESE

友達を食べた牛から作られたピザを食べました。

BACK INTO ENGLISH

I had pizza made from cows that had eaten my friends.