Somewhat controversially, an egg.
Like, a good, over medium egg? Okay I can do that. I hate a super runny, the yolk blasts you in the face like an unapologetic lover and leaves you to clean yourself up, egg in my burger.
In fact, anything that's made with your Instagram reel in mind. I don't want greasy buns, dripping yolks, and sauces pouring out. If you made a good, juicy burger you wouldn't need all that.