If you ever plan on asking a nutrition expert to choose between skipping breakfast and eating at Taco Bell, expect a long, uncomfortable pause. The truth of the matter is that healthy fast food breakfast is nonexistent. But when it's your only option, you can make due. "These aren't everyday items," says Lisa Cain, founder of Snack-Girl.com. "These are once or twice a week if you can't do it any other way." With that caveat in place, here are some of the best choices you can make when you find yourself in this less-than-ideal situation.