A sign behind the counter at Harmon's Lunch warns customers. "This is not Burger king. You don't get it your way. You take it my way, or you don't get the damn thing." In our estimation that's fine, because Harmon's hamburgers are just right. Doneness is not an issue. They are all cooked medium – nice and moist but not oozing juice or pink inside. They are lunch counter patties par excellence, sizzled on a seasoned old griddle and sandwiched inside soft Portland-bakery buns that are buttered and heated just enough that they become ultra tender mitts perfect for hamburger-holding.