So far as I know, the oldest in the English language at least, is Banting's Letter on Corpulence. Having lost weight and dramatically improved his health on a low carbohydrate diet. Banting wrote and self-published the book back in the Mid-Victorian era, and he distributed it for free.
Read More »Low-Carb Lesson #62: A Low Carb Menu For Casual Entertaining
Since I didn't want to spend an inordinate amount of time in the kitchen, our meals revolved around some type of meat on the grill, deviled eggs, a vegetable relish plate with dip, and a fruit plate. I made the deviled eggs, the vegetable relish plate, and the fruit plate up at the beginning of the week and replenished them daily as we ate all of certain items. So when dinnertime rolled around each day, I simply had to turn on the grill to cook the meat and bring out the various plates of side dishes.
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