Recession Meals - what was a staple for you during the last one?

Trying to save as much money possible as an adult in America on a fixed income. I try to spend as little as I can right now on groceries, but know I should prepare for the worst before it comes. Whether it’s just beans and rice, or oatmeal, I want to know to either stock up now, figure out recipes now, or start eating it now to save money before.

Any input is greatly appreciated. Thanks so much in advance.