Here's a quick and easy formula that hits the calorie and macronutrient ratio targets for days 2-5 of the "fasting mimicking diet." I can't claim it is THE fasting, mimicking diet, because (so far) there really is no such thing. Tons has recently been written about this diet, but it's mostly guesswork and speculation. The reality is that the researcher/author, Valter Longo, Director of the University of Southern California Longevity Institute, hasn't provided much detail.

Note that this diet is intended for occasional use (anywhere from monthly to twice yearly) and the primary purpose is life-extension (and healthy life extension) not weight loss (although that may be a side-effect).

For more information, I'd suggest having a look at the Wikipedia entry here: https://en.wikipedia.org/wiki/Fast_Mimicking_Diet

See also, the published paper that is the basis of my formula here: http://www.sciencedirect.com/science/article/pii/S1550413115002247

Pros:

-Hits the targets (725 cals/day, 47% fat, 44% carbohydrate, 9% protein) very well

-Only 5 ingredients

-Easy to measure out and blend up a day's supply

-Very nice taste: vanilla, blueberry, coconut. Almost too good!

-Smooth, creamy mouth feel, no grit

Cons:

-Pricey, especially the Complan and blueberries (but, you're only having 725 calories, and only for 4-5 days, so price per calorie isn't as big an issue as with a totally soylent diet). I'm considering a variant using plain old milk as the protein source, and a multivitamin to help out with the vitamins, minerals, and trace elements. And blueberries could be replaced with a cheaper carbohydrate source, such as sugar, oats, dates, raisins, prunes, etc.

-Maybe a little high in saturated fat

-Not easy to substitute for the Complan or the coconut cream, other products vary radically in their macronutrients (Note: be very careful to only use Complan Vanilla, unless you want to do a major reformulation. Other flavours may look tempting, like the double chocolate, but the nutrient profile is so different that I'm amazed the products are all called Complan. They're all totally different. Same with the coconut cream. Every one is different)

-Needs a freezer for the blueberries. All other ingredients have good shelf life.

I hope to do a version for the first day of the diet (1090 calories, 34/56/10% C/F/P) when I get a chance.

Constructive criticism is welcome. I know it's nowhere near perfect, but it tastes good and hits the targets without much fuss. Better still, make something better and share it. It would be great to have some variety.

P. S. A dash of cinnamon goes really well with the blueberry flavour.