I think I found the one we're talking about, over on CCLI. The title is "Communion Song" by Barry McGuire. Give it a try!

I'm looking for the same song, I think. I think I know the title, but it's not much help because the title is "The Communion Song" and other songs have that title. I can't find the one I'm looking for.

I think I even remember that it was composed and sung by Jani (Janny? Jenny? Janni?) Gries (Gries? Grice?). Her last name rhymes with "ice" -- Grice. Because I don't know the spelling of either her first or last name, I can't find her on the internet. But the song was so simple and so dear, that I think it's the same song you're looking for. I heard it on the radio in about 1985 or so.
Can anyone else help? Jani, are you out there?

This is not the Jimmy Owens song. Some yeas ago we sang it on communion Sunday. This is all I remember...."Take it, eat it, andwhen you do remember me.