One opinion:

https://www.livescience.com/11377-7-perfect-survival-foods.html

Beans, there are many kinds of beans, try Black Beans, Red Kidney Beans and Pinto Beans.

Kale

Cantaloupe

Berries, there are many kinds of Berries.

Barley

Seaweed, there are many kinds of Seaweed.

Fish, try Salmon.

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Women should eat at least 1,200 calories per day, and men should eat at least 1,800 calories a day

Women eat at least 1,200 calories daily and men get a minimum of 1,500 calories a day unless supervised by their doctors. Women who eat 1,200 calories and men who consume 1,500 calories a day will likely lose weight. To maintain current body weights, women often require 1,600 to 2,400 calories daily, while many adult men need 2,000 to 3,000 calories a day

https://www.livestrong.com/article/300423-approximately-many-calories-survive/

https://www.livestrong.com/article/310517-minimum-amount-of-calories-needed-per-day-to-survive/

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People have been known to survive on Potatoes for months and Water of course, so if you don't eat anything else, eat Potatoes and drink Water.

If I was you I would also eat Tomatoes, as some people might survive for months or even for one year on Potatoes, Tomatoes and Water.

http://www.bbc.com/future/story/20170224-what-food-would-keep-you-alive-the-longest

https://www.livescience.com/10163-man-eating-potatoes-2-months.html

http://theconversation.com/can-you-survive-eating-nothing-but-potatoes-54262

https://www.sciencedaily.com/releases/2015/09/150929181351.htm

Mr Voigt himself says he has lost 18 pounds. His previously borderline-high cholesterol has dropped - down 52 points at the half-way mark. And the family food bill is down as he can feed himself for $15 (£9.40) a week.

"Physically I feel great. Lots of energy, sleep good at night, no strange side-effects," says Mr Voigt from his office in Moses Lake, Washington state.

http://www.bbc.com/news/magazine-11864290

They say that it might be a good idea to add some Pinto Beans to that Potatoes diet, if so then eat:

Potatoes

Tomatoes

Pinto Beans.

In a few months you might feel and look better than you ever did before, but who knows?

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Incidentally, if you were morbidly obese, and you were given the exact micronutrieints you need (not just vitamins, but also including essential oils and minerals) - and no potatoes, you might live a year.  There are medical studies of obese people going on a starvation diet, with only micronutrients, living healthy lives for quite long time periods. I believe at least one case was a year or longer. 

https://www.quora.com/Could-a-person-survive-on-nothing-but-potatoes-and-multivitamins-for-a-year

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I made a list of foods that I think that a person would live well enough on and nothing else, but it is just what I think and I might be wrong:

In no particular order

And you would not have to eat everything on the list everyday, you could eat some things one day and other things other days and change the mixing of foods  as and when you like.

Water

Salt, at least a little every so often.

Potatoes

Tomatoes

Beans any and or all kinds including Green Peas, Garbanzo Beans and Lentils, but if only one kind then Black Beans or Red Kidney Beans or Pinto Beans.

Rice

Corn

Sweet Potatoes

Eggs

Carrots

Spinach

Parsley

Radishes

Beets

Cucumbers

Lettuce

Cilantro

Celery

Apples

Oranges

Bananas

Peanuts

Cocoa Beans or Cocoa Powder

Sunflower Seeds

Sesame Seeds

Flax Seeds

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Maybe no meat is needed, Eggs provide the very best Protein possible.

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If you wanted to you could take a good enough NATURAL Muti-Vitamins-Minerals such as:

Nature's Way Alive! Once Daily

The 50+ are best for all, younger and older people, you don't have to be 50+ to take them, they are better for you even if you are 18 years old.

https://www.amazon.com/Natures-Way-Multivitamin-Potency-Food-Based/dp/B003UEJAQ8/ref=sr_1_6_a_it?ie=UTF8&qid=1508323770&sr=8-6&keywords=Nature%27s+Way-+Alive!

https://www.amazon.com/Natures-Way-Alive-Potency-Tablets/dp/B003UEH7DQ/ref=sr_1_8_a_it?ie=UTF8&qid=1508323770&sr=8-8&keywords=Nature%27s+Way-+Alive!

By the way, something that some people don't know is that there is not too much of a difference between Vitamins and Minerals for Women and for Men, they don't have Hormones in them.

So Women can take Men's Vitamins and Minerals

And

Men can take Women's Vitamins and Minerals.

After all, Vitamins are just Vitamins and Minerals are just Minerals.

There is NO Female Calcium NOR Male Calcium NOR Female Vitamin C NOR Male Vitamin C.

If they had Hormones for Females or Hormones for Males then you could not, but they don't have Hormones.

Of course, you don't need a Multi-Vitamins-Minerals even if it is Natural from Food Sources such as those if your food provides them.

The Potato Song

https://www.youtube.com/watch?v=q7uyKYeGPdE

https://www.youtube.com/watch?v=5Co4YI_Vsmg

https://www.youtube.com/watch?v=efMHLkyb7ho

https://www.youtube.com/watch?v=ow2-msa4AQY

This next is freaky:

https://www.youtube.com/watch?v=5XRiGi1eofQ