I personally know some folks who spend all their money on fast food, and then online it seems pretty common folks not knowing how to cook causes massive financial problems.
My super duper cheap meal that takes no effort is “lazy rice veggie soup”: Can of peas and carrots cooked with a bouyon cube until cube is dissolved Add cooked rice to mix, and heat until rice is flavorful with absorbed broth
I do a cup of dried rice, and a can of peas and carrots which means the soup has 800ish calories and I think it’s pretty good as it’s either 2 small meals that you can have sides with, or one large one!
So what are your cheap meals you like to make? The less well known, the better!
potato
Off-topic but this could be interesting: https://traumbooks.itch.io/the-sad-bastard-cookbook
Gruel! Three spoons of oatmeal in a bowl, pour about 500ml (~1 pint) of boiling water on it. You can put a bit more oatmeal in, but if you go too far you get porridge. You’re aiming for thin or miserly porridge.
For a mild seasoning, you can cry over the bowl, and let the salt from your tears enhance the subtle flavours. If you’re feeling rich, salt can be purchased from shops and used instead.
For optional nutrients beyond simple survival, you can then throw any leftover or past-best veg, precooked meat or edible garden plants in the bowl. For deliciousness, you can add a bit of butter, or even cheese.
Heat it in a pan on the hob, whilst stirring, for as long as you can be bothered waiting. Cooking for longer tends to make it taste better. Alternately, microwave it for a few minutes.
You’re ultimately going to end up with something like a thick soup (or a luxurious cheese sauce, depending on ingredients) that’s surprisingly filling, and significantly nicer tasting than you might expect from the description.
Gruel. It sounds shit, but it’s ace.
The Victorians considered gruel to be health food. Mind you, they also thought granulated arsenic was a good substitute for sugar.
Bananas, potatoes, corn, oats, bread and rice are all pretty cheap. When I’m trying to not spend any money I’m fine with a bowl of oatmeal with some sliced bananas in it.
I’m more of a “cook over ripe banana into the oatmeal” person.
Gives it good flavor and a bit of sweetness.