If a potato was cooked on a separate pan, uncovered, in an oven with meat on a separate pan, covered, can the potato be eaten with fish?
Answer:
Yes, the absorption of flavor of meat does not prohibit from eating with fish, as long as no actual meat is present.
Sources:
Taz,Y:D 95:3, Shu”t Chut Hashani 67, see also CHasam Sofer Y:D 111.