When I was in grad school while working full time, I found that ingredient prep was (for me) the fine line between eating homemade and calling for takeout.
For example: ground turkey / beef package divided into half and flattened before freezing meant meat sauce for pasta could be prepared using frozen homemade tomato sauce while the pasta boiled and the broccoli steamed.
Separating a package of chicken thighs into 2-serving portions and freezing them with a marinade (yogurt/indian spices, lemon/herbs/olive oil, harissa, zhoug, etc) enabled some version of broiled or pan-grilled chicken with little effort, and the meal came together in the time it took to steam or sauté a vegetable side.
I still do a lot of these things, especially the chicken/fish/meat marinading and batch cooking & freezing some foundation items.
I also use my little PC a lot to speed up fussy recipes - indian curry bases, all-in-one rice dishes (chicken&rice/biryanis/pulaos/pilafs/risottos), beans/lentils, even pasta sauce (a riff on the MH tomato/onion one with butter is hands off and takes maybe 15 mins). I’ve tried all-in-one pasta dishes in the PC - definitely quick, and the texture is good once you get the timing right).
Fish & shrimp are always a lifesaver - same rotating marinade idea as the chicken, but even if there’s no marinade, a salmon fillet takes 12-15 mins hands-off time to low-temp roast in the toaster oven, and the marinade can be a sauce on top instead.
Rice/quinoa is always a bulk-cook item - if I’m making it, I might as well make enough for the week at one go, and I’ll plan 2-3 meals around that.
In general, I’ll try to cook 2 meals worth even though I won’t eat them two days in a row - something I made on Monday is new again by wed/thurs - or I’ll freeze the second portion to pull out in a week or two, when I’ll be happy to rediscover it!