I've been doing this for years. I cook for my wife too since it takes the same amount of time.
Repertoire is actually quite deep
- Mustard chicken + Rice A Roni + veggies
- Jamaican brown stewed chicken + rice and peas + veggies
- Mexican rice + taco beef + salsa + cheese
- Turkey breast + Stove Top
- Lamb/Beef tangine with lemon garlic couscous
- Chicken & pasta (occasionally)
Food can get a little less than fresh towards the end of the week but I've been cooking Sunday and eating all the way through Friday with no problems.
I optimized the process for time as well. I don't bother packaging the lunches individually- I just put it in a big Tupperware container and split it up at work. I have a bowl/plate and silverware as well.
I prep my shakes too... 100g protein powder, 40g fiber, 6g creatine... I make a 5 day batch and then fill 5 protein shakers with them,
DRY. Then just add water at work after my workout.
Whole thing is super efficient and saves me so much money. Each meal is like 600-1000kcal and probably costs no more than $4-5 with -$3 being the average. I think starting with basics like chicken/sweet potatoes/veggies is good though but learning how to really cook is key. Very nice to switch things up and add flavor without piling on calories too.