But seriously: for the week. I have multiple family members who do this and used to do it myself: most meals last up to a week in the fridge, so just put a little extra in Sunday night so you have leftovers for lunches.
My previous version of this was to start each week with giant: salad, pasta salad, fruit salad. Then I have a complete meal, including variety by just throwing a protein in the toaster oven.
I’m trying to restart something like this now that its back to just me all week: I have a 10 lb pork shoulder for the smoker!