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 :)
I have a 5 liter pot. I'll make a big batch of chili/stew/soup and freeze it in pint size containers. Right now I have portions of lentil soup and chili sitting in the freezer. It takes me five minutes to microwave.