Lettuce, thin sliced tomato, thin sliced or chopped onions, and plenty of relish. That’s by far my favorite condiment. I’m always opening my fast food burgers after bringing them home, and dumping plenty of relish on them.
Oh yeah, I forgot about mushrooms. I love mushrooms on burgers. But fast food joints seldom have them and I avoid burgers in traditional restaurants since the burgers are invariably too thick for my taste. Sometimes I’ll make mushroom burgers at home.