If I have this, I don't need any other side dishes.
I could just keep eating rice as long as I have this pickled radish to go with it.
この場合、次のような言い方ができますよ。
ーIf I have this, I don't need any other side dishes.
「これがあれば、他におかずは何もいらない」
side dishes で「おかず」
ーI could just keep eating rice as long as I have this pickled radish to go with it.
「この蕪の漬物があればご飯をどれだけでも食べれる」
pickled radish で「蕪の漬物」
ご参考まで！
カナダ 
