Jayapataka Swami: If you are worshipping Nitāi-Gaura as the Supreme Personality of Godhead, they can be offered grains. In the temple I think they offer grains, in the house deities, since the devotees in the house take non-grain, they offer non-grain to the Nitāi-Gaura Deities, not being able to cook separate. But since we worship the Lord Nitāi-Gaura as the Supreme Personality of Godhead and His first expansion, they don’t need to fast.
08-June-2020 SRI DHAM MAYAPUR, INDIA