すみません、このお惣菜を温めてもらえますか？ — Excuse me, could you please heat up this deli item? (Convenience · Store, Formal — to staff, JLPT N5)

Gesture & etiquette

Hand the specific item to the staff while making the request.

Do not expect all items to be heatable. Some items like salads, sandwiches, or specific fresh pastries are not meant to be heated and the staff might refuse for quality or safety reasons.