OMG, best sandwich ever is fresh from the garden sliced tomatoes with mayo on cheap white bread but not toasted so that it’s all soft and gooey. Second best sandwich ever is cold meatloaf on cheap white bread with one side mayo and the other ketchup.
Another sandwich I like is along the lines of the deviled ham idea but using leftover steak or beef tips. Put the beef into a food processor, add onion, a bit of pickle or relish, mayo and mustard and maybe a dash of Worcestershire. On cheap white bread but maybe toasted since the beef is more hearty.
And cream cheese on toast topped with homemade salsa but store bought will do, yummmmmm.
We like the standard meatloaf - a couple lbs ground beef, crushed saltines, a couple eggs, onion, a can of diced tomatoes, parsley, basil, salt and pepper and whatever leftover veggies found in the fridge. Any shape or size of pan but make sure to leave a finger width moat between the meat and the edge of the pan so the grease can ooze out and be drained off later. Top with a good slathering of ketchup.
Meat loaf - Instead of ketchup or canned tomato (?) try a good dollop of bbq sauce and yellow mustard.
One of my favorite sammiches is lettuce and miracle whip on lightly tasted white bread. That’s it. :)