What I am really looking for are the best meal ideas for breakfast (easy to pre-make or make in a microwave at work), lunch (microwave at work, also home on weekends) and dinner (home). I would like to set up some sort of eating schedule and spend only around $50-$60 a week on groceries if possible.
I always find time to make an actual breakfast even though I work at 4:30 in the morning many days; eggs and some meat takes less than ten minutes to put together. If you're trying to speed things up beyond that, precook an entire tray of bacon or sausage and keep it ziplocked in the fridge to be microwaved when you need some. There's also cottage cheese or plain Greek yogurt with berries (a 3-pound bag of frozen berries is only about $6. Won't be as nice texturally as fresh, but just as good otherwise) and a small handful of almonds.
A couple simple suggestions for lunches or dinners: buy those gigantic value trays of ground beef or precut stew beef. They're absurdly inexpensive and can be used for so many different things, with any extras easily frozen for later.
Marinate the stew beef in some soy sauce, red chili flake and maybe a little coconut milk (literally dump it all in a big bowl, stir it up and cover with saran wrap in the fridge) and cook a couple large batches in a skillet for a super quick, portable meal you can pair up with frozen broccoli. Again, takes like 15 minutes to make.
Buy green bell peppers (often $1/ea) halve them and fill with a seasoned ground beef mixture and some cheese. Bake for 40 minutes, and there's another batch of dinners that can be heated up quickly.
I prefer to spend more time on flavors and different ingredients, but these are just some ideas that are cheap and easy for the kind of people who are a little cooking-phobic and/or always in a rush.