German phrase
Welche Beilage empfehlen Sie zu ~?
Meaning
What side dish would you recommend with ___?
When to use it
It asks which side dish fits. It is a polite restaurant phrase.
Example dialogue
Welche Beilage empfehlen Sie zu dem Lachs?
What side dish would you recommend with the salmon?
Ich empfehle Ihnen Reis und gedünstetes Gemüse.
I recommend rice and steamed vegetables.