I go into the Potato Mono-Diet pretty well on my website. And I have links to McDougall information and others.
It's really good for losing weight, too. At some point you will reach a weight that is naturally the weight you are
supposed to be at, so you generally don't have to worry about losing too much weight.
Since the potato is literally a "perfect food", and you can live off of them exclusively with perfect health,
it's a good way to go. The only thing they do not have is Vitamin B12, which you can usually easily not worry about
for at least a year, if not longer, and Vitamin D, which you get through sunshine exposure.
There are other carb Mono-Diets, like corn, and beans, but I think the potato is the way to go.
You don't even need to eat other vegetables, but you can. Some people eat only potatoes, and
some also eat sweet potatoes for variety. You can eat them mashed, boiled, baked, and roasted.
And fried, but McDougall is 100% ANTI-OILS, because they are cancer causing and cancer promoting
and poor health causing and poor health promoting.
He also suggests very low sugar and very low salt. And no processed or concentrated foods.
I call it McVeganism. (very "strict" Vegan with no oil and low salt and sugar with no processed or concentrated foods)
You can eat as many and as much as you want, because they are very filling, so you can only eat so much.
For breakfast, lunch, dinner, and snacks. The different cooking methods add variety. So if you cook up big pots
of mashed potatoes, and some boiled and baked and roasted, they are just there for you to grab and eat.
Remember: Nothing "bad" on the potatoes, like butter or margarine, or sour cream, etc..
You will get REALLY tired of just eating potatoes.
But if you put A1 sauce on them, A1 sauce makes everything taste good.
And spices, like onion powder, garlic powder, nutritional yeast, etc.
I would do it for at least 2 weeks as an eating habits RESET.
(and it WILL majorly reset your eating habits and taste buds and cravings)
3 or 4 weeks would be better, but it is not easy.
And then you can eat mostly potatoes and add vegetables at some point, for as long as you can do that.
Then, if you want, add other stuff if you don't want to be as strict. Play it by ear.
After a few weeks or so, we also ended up doing a Sunday Funday, where on that day you can splurge and
eat processed foods and such. (for us, mostly Vegan, but at least Vegetarian)
But they ended up not tasting as good as they used to because we had gotten used to eating so simply.
I think you will be surprised in more ways than one what it does for you.