Here is an attempt at constructing a modern equivalent to the diet humans
likely evolved to eat:

Eggs: Any variety
Meat: Any variety.
Nuts: Any variety, excepting peanuts and other "nuts" that are not nuts at all.
Fruits: Any variety.
Berries: Any variety.
Vegetables: Any that do not require cooking to be comfortably edible.

There would be almost very, very little of any of the following:

Cereal grains
Beans
Dairy products of any sort (outside of infancy)
*Tubers

(Perhaps an occasional treat?)

Eggs, meat, and nuts would be eaten ad libitum and would probably make up a
majority of the intake.  Meat would be raw, dried, or cooked over an open
fire and most likely rare.  Fruits would be eaten sparingly.  A majority of
the rest of the food would be eaten fresh and raw most of the time.

Such a diet is very easy to live on even in this modern world; moderately
expensive perhaps, but not prohibitively so for most, especially if it
brings health benefits.

The question would be: is this a realistic modern reconstruction?  Or are
there flaws to the model?  What possible negative health consequences might
be associated with such a diet?

Comment is invited.

 -=-=-

Once in a while you get shown the light/
 In the strangest of places if you look at it right   ---Robert Hunter

http://www.syndicomm.com/esmay