I used to own an instant pot. Those are great. I gave it away when I moved and now I just have a regular pressure cooker, which is also really great.
My quickest and easiest, but still yummy thing to make is chickpeas. I soak them overnight. Pick out the ugly ones. Drain the water. Barely cover them with fresh water (since they’ve already soaked, they don’t need tons of water). Then I heat the pot on high until I hear the pressure noise, switch it to low heat, and let it cook for 15-20 minutes. Then I turn off the heat and let the pressure out naturally.
Once they’re done I sometimes just eat a bowl of them with nothing more than olive oil and salt. Yum.
One of my other favorite dishes is a bit more elaborate but still simple and healthy: split pea soup. I don’t soak the peas but I do rinse them. I put them in the pressure cooker with a bay leaf, chopped garlic and onions, diced potatoes and carrots, and I'll cover the whole thing with a decent amount of water. Then, like the chick peas, I’ll let the pressure hiss, then put it on low heat for 15-20 minutes. I let the pressure naturally release.
Sometimes I’ll sautée even more onions and garlic in a separate pan with avocado oil on low heat for a while, until they look like they’re getting caramelized (fucking yum).
When the soup is done, I’ll remove the bay leaf, add the extra onions and garlic (if I did that step), add some salt, then use an immersion blender. It’s SUPER IMPORTANT to remove the bay leaf if you use an immersion blender.
Then when I eat it, I put a decent amount of olive oil and make sure the salt level is tasty. Even better if I have spicy olive oil around :)
Blackened shrimp or chicken burritos. Yes, shrimp. It's $16 for 2lbs. at Aldi, and it's quality meat. My wife and I get 4-8 meals for that, the rest amounts to about $2, if that.
Sear the tortillas (corn or flour, you do you) in butter or margarine for a few, throw it on the plate.
Fry up a few shrimp in a cast iron pan, drench in black spice to taste. (Black spice: Cayenne, chili powder, paprika, black pepper, salt, cumin, powdered garlic, onion powder, mix to taste and add whatever else you like. White pepper is the shit if you can afford it! Use the cheapest bulk crap you can buy at the ghetto grocery, nothing fancy or it will be too spicy, too many strong favors.)
Dice onions and chop some tomatoes, cheap lettuce if you like.
Throw your choice of shredded cheese on top of the cooked meat, pile on the rest of the ingredients.
Bring your own salsa, but I'd recommend something with a bit of acid like a tomato based sauce. Want it hotter? Much on some dehydrated chile árbol peppers (between bites!) from the Mexican store. Stupid cheap for a year's worth of heat.