YOU SAID:
No tomato for the potato.
INTO JAPANESE
ジャガイモにはトマトはありません。
BACK INTO ENGLISH
There are no tomatoes in the potatoes.
INTO JAPANESE
ジャガイモにはトマトが入っていません。
BACK INTO ENGLISH
There are no tomatoes in the potatoes.
That didn't even make that much sense in English.