I don't even know it this counts as "weird", but here's two of my favorites:
1) Tuna Sammich -- water-pack chunk-light tuna, drained and squeezed, with Miracle Whip on toasted wheat bread. No fancy "sandwich goop" or chopped pickles or tartar sauce or celery, JUST the three things mentioned. I'll never understand why people have to glop things on.
2) this constitutes a full meal and then some: Two or three SteakUmms, fried or griddled, on wheat bread -- no sauces or dressings or cheese or anything else, TYVM -- a bowl of air-popped popcorn with or without salt, a couple of cubes of Medium Cheddar and some Kosher Dill Pickle spears.
The odd bits for both these are that they have to be just. that. .way. Med cheddar, not mild or sharp or colby; MW, not mayo; chunk light, not the fancypants Albacore....the details :D