PURPOSE: To mass produce efficiently a fry product, particularly a relish having a unique flavor, by frying a food having a relatively thin structure, and introducing the fried food as a TEMPURA product in an airtight container, reducing the pressure in the container to evaporate the moisture from the TEMPURA.

CONSTITUTION: A dried cuttlefish or laver, etc. is fried in oil to give a TEMPURA product having a relatively thin structure. The TEMPURA product is prepared not to scorch the center as much as possible. Therefore, the inside thereof contains a little moisture. The resultant TEMPURA product is then transferred to an airtight container, which is then evacuated to make the moisture in the inside of the TEMPURA break through an oil film and evaporate to the outside thereof. Thus,the aimed crispy relish having the flavor unique to the fry product is obtained.