Hubby marinated the steak in a mixture consisting of a half a Bard's gluten free beer and two tablespoons each of apple cider vinegar and gluten-free Tamari soy sauce, plus some salt and pepper. It was just one big steak (there are only two of us) so you'd want to increase that if you are making more! I'm not sure exactly how marinade carbs up the meat but I suspect not much.
Of course, this uses a raw egg so you should use a high quality one. If you aren't sure if your eggs are fresh, click here to go to a site which has some great tips on how to tell. If the whole idea of a raw egg grosses you out (it's sooo good for you!), you can boil it for one minute before you open it.
4-5 small rice crackers (optional)