I swear I posted to this thread already, but I can’t find my post so I guess not.
When we make burgers at my parents’ house, nothing- not salt, not pepper, nothing- goes into the meat. It’s just a thick round patty of deliciousness, formed by my mom but usually cooked- on the stove, not a grill- by me. Mom’s gets cooked just enough that the outside is seared; my brother and I go for medium-rare, and my dad’s is cooked not just well-done but overdone and left in the pan to cool and die even more. He likes it that way. Crazy Texan.
However, our meat is from cattle from my family’s farm, and it has a lot of flavor on its own. My mom might add a little hot sauce to her plate, especially if we’re eating hamburger steaks (with sauteed mushrooms and onions, French bread, and steamed spinach) instead of burgers on the bun; I salt the patty in either case. But the inside stays pure.
I think Jacques Pepin uses this method in Julia and Jacques Cooking at Home, but I left that at home, not in my dorm, so I can’t check.
I didn’t even know that you could put stuff into hamburger patties until I was 10 or 11, and discovering it freaked me out. Stuff goes on the bun, not in the the burger!
(My “stuff” is usually a little ketchup, a little mustard, a little mayo, then the burger patty, then sliced tomato, onion, and dill pickle, with salt on the top of an onion or plain burger bun; sometimes we grill the onion, sometimes I use tartar sauce instead of the other sauces.)