Many have hinted toward it but there is no natural food that meet all three needs. To achieve that you need to mix up several foods.
Rice, Potatoes, and chicken are extremely cheap and probably your best bet.
!nostupidquestions is a community dedicated to being helpful and answering each others' questions on various topics.
The rules for posting and commenting, besides the rules defined here for lemmy.world, are as follows:
Rule 1- All posts must be legitimate questions. All post titles must include a question.
All posts must be legitimate questions, and all post titles must include a question. Questions that are joke or trolling questions, memes, song lyrics as title, etc. are not allowed here. See Rule 6 for all exceptions.
Rule 2- Your question subject cannot be illegal or NSFW material.
Your question subject cannot be illegal or NSFW material. You will be warned first, banned second.
Rule 3- Do not seek mental, medical and professional help here.
Do not seek mental, medical and professional help here. Breaking this rule will not get you or your post removed, but it will put you at risk, and possibly in danger.
Rule 4- No self promotion or upvote-farming of any kind.
That's it.
Rule 5- No baiting or sealioning or promoting an agenda.
Questions which, instead of being of an innocuous nature, are specifically intended (based on reports and in the opinion of our crack moderation team) to bait users into ideological wars on charged political topics will be removed and the authors warned - or banned - depending on severity.
Rule 6- Regarding META posts and joke questions.
Provided it is about the community itself, you may post non-question posts using the [META] tag on your post title.
On fridays, you are allowed to post meme and troll questions, on the condition that it's in text format only, and conforms with our other rules. These posts MUST include the [NSQ Friday] tag in their title.
If you post a serious question on friday and are looking only for legitimate answers, then please include the [Serious] tag on your post. Irrelevant replies will then be removed by moderators.
Rule 7- You can't intentionally annoy, mock, or harass other members.
If you intentionally annoy, mock, harass, or discriminate against any individual member, you will be removed.
Likewise, if you are a member, sympathiser or a resemblant of a movement that is known to largely hate, mock, discriminate against, and/or want to take lives of a group of people, and you were provably vocal about your hate, then you will be banned on sight.
Rule 8- All comments should try to stay relevant to their parent content.
Rule 9- Reposts from other platforms are not allowed.
Let everyone have their own content.
Rule 10- Majority of bots aren't allowed to participate here.
Our breathtaking icon was bestowed upon us by @Cevilia!
The greatest banner of all time: by @TheOneWithTheHair!
Many have hinted toward it but there is no natural food that meet all three needs. To achieve that you need to mix up several foods.
Rice, Potatoes, and chicken are extremely cheap and probably your best bet.
Beetroot, chickpea salad
I hope feijoada qualifies here. Black beans stewed with various pig parts (snout, ear, feet), served over rice.
I think falafel and pita with all the veggies and sauces might be something that fits the bill that you can find easily.
Falafel is made of chickpeas which are healthy, but deep frying them isn't very good for you. Not too bad as long as you don't eat it all the time, but OP asked for healthy foods.
You have two tiny balls of falafel with huge serving of veggies, pita and veggies. I don't think it's particular unhealthy compared what people eat usually. You could of course airfry or bake the falafels if you want to avoid that as well.
Okra, it's easy to grow. Bugs and squirrels don't seem to bother it. Frozen isn't too expensive
Ground beef and eggs are about the most nutrition packed and inexpensive foods around.
Honestly I don't think you'll find any one thing you can eat that will tick all of the boxes indefinitely, otherwise we would already be eating it!
With portion sizes controlled my easy vote would be an egg stir fry with low amounts of oil, a minimal sauce, and lots of in season veg.
Celeriac (celery root - you can also use zucchini instead) fritters. Shred celeriac, carrots, onions and peppers, mix with salt and let sit, then squeeze out the water using cheese cloth. Mix in an egg, a small handful of flour, roasted and/or black garlic and some pepper. Form into balls and deep fry until the outside is golden brown and crispy, then drain on a rack or paper towel (you can also form into patties and pan fry them, same flavor but missing the solidity and the crunchy shell).
Very cheap (it's basically just vegetables and an egg) and very low-calorie and IMHO much more delicious than french fries.
Mac n cheese.
Ratatouille.
A lot of cuisine that is lauded all around the world embraces all three of those, or at least the original dishes they came from did. A lot of really fancy food today and in the last 50 years is just "peasant food". Sometimes just with fresher ingredients and more butter
We have a type of French toast. Old stale bread, milk, egg, sugar (and cinnamon) that's it. Simple, cheap and very tasty.
Ground beef