I like mine without mayo but with entirely too much butter, soft butter, spread on the bread.And if the bread can be really, really fresh and squishy, all the better.
Hmmm. Never tried it with butter. Sounds interesting. I don't think you could go wrong with a fresh tomato involved. :-)
Makes my mouth water just thinkin' bout it;but I must admit that I like a thin slice of bologna on my sandwich.Oh YUM!!