Is there a food that is cheap, delicious and healthy at the same time?
I have a theory that there is a impossible trinity (like in economics), where a food cannot be delicious, cheap and healthy at the same time. At maximum 2 of the 3 can be achieved.
Is there any food that breaks this theory?
Edit: I was thinking more about dishes (or something you put in your mouth) than the raw substances
Some popular suggestions include
fruits (in season) and vegetables
lentils, beans, rice
mushrooms
chicken
just eat in moderation
Edit 2: Thanks for the various answers. Now there are a lot of (mostly bean-based) recipes for everyone to try out!
Also someone made a community for cheap healthy food after seeing this topic!
Ingredients are cheap (you can add nearly any seasonal vegetables) and lentils can be grown locally (America, Europe, Asia, maybe elsewhere too) without too much environmental damage and dried lentils can be stored for long times, you do not need expensive spices and no industrial processed stuff.
Cooking it in a pressure cooker makes it energy effective and done very fast.
You can freeze it over longer periods, so you can make one big pot, but eat multiple times. It should stay perfectly fine for three month in a freezer* and we kept it for three days in a fridge just fine (could stay good longer but I haven't tried it).
And we love it.
If you plan to put it into a freezer do not salt it. Salt it when heating it up again.
When in frozen food "salt loses flavour, and causes fat to go rancid more quickly". - source: my grandmother
So depending on the food you put into the freezer much of its taste is gone anyway and it can harm the fat, especially if the food contains meat.
Disclaimer: I am not a chemist or cook.