Oof. My favorite sandwich, which I make whenever I can:
Take roast beef, and some roasted turkey/chicken. put them in between two slices of white bread. Spread garlic butter (unsalted butter with roasted garlic cloves mixed in) on both slices of bread (on both sides too) spread a lot of cheddar cheese (yellow and white) ((the kind that you would use with nachos and such). Put lettuce and tomatoes on, and toast the sandwich as a whole by putting it on a pan with some butter in it on your stove burner.
SO FUCKING GOOD