@tsarstepan,
A rather useless answer since meatloaf sammichas are made any ways. Dry as a Druid, moist as a mud cake, and what meat? with veal, beef, gloating gopher, pork, yak, there may be bacon, there may be catsup, mustard, bread crumbs (flavored...different varieties, plain) wheat germ, with onion, w/o., is there mayo, an egg, paprika?
Then the bread...
Then any spread...
Then the extrees...tomato, sliced raw onion, shredded
carrot... Hey there's the answer!
Carrots (raw) in a tie with homemade borcsht with a tasty brown bread (fresh baked).
Maybe a pastrami sandwich...