i panfry some form of protein in butter if i am not having eggs. steak with some herbs. livers with something like thyme or oregano ( lambs or chicken ). butter fried fresh fish with herb salt. wild venison. wild pork. i would imagine broth with meat of some kind would be awesome if it is cold. pork bones in broth for example. the meat nearest the bone is usually the sweetest so my kids would eat it and chew all the marrow when they were younger.
if it's just you for breakfast and you are in a hurry, bulletproof coffee is pretty good.