If you’re a meat person, buy a proper lump of meat for a full-on roast dinner at the weekend, then use the leftovers. We still eat this way, and spend very little on food in general. Once you’ve made the initial outlay of money for ingredients and time in roasting the meat (which doesn’t require your input, so you can do laundry or work while it’s in the oven), the other meals only need as much preparation as you can be bothered with. A fried meat and onion sandwich takes two minutes when you’re starving and exhausted (and a sachet of sloppy joe mix stirred in as an occasional treat will cheer you up and remind you of home); a gourmet curry from scratch could take a while if you want it to (but no-one will mind if you use a curry paste or powder, either!).
For instance:
Day one, roast beef, proper gravy, Yorkshire puddings, potatoes, vegetables.
Day two, sliced beef heated in the gravy, with bubble and squeak.
Day three, stir fry with stripped beef, fresh vegetables and noodles.
Day four, beef tacos/fajitas/burgers.
Day five, stew and dumplings/cottage pie.
Day six, beef curry with rice/pasta with beefy ragu/pastry-topped pie.
Day seven, whatever - if there’s beef left, I’ll do something with it, if not we’ve had our money’s worth from the joint. And the carrots, parsnips, potatoes etc you bought on day one to go with the roast will be good all week.
On day eight it’s time for a different piece of meat!
Of course if you decide you’re sick of beef, you can make it into stew, ragu or curry and freeze some portions for another week when you’re sick of chicken. That seldom happens to us. I know it’s the same meat every night, but it’s different vegetables, spices, herbs, presentations, accompaniments, condiments… It works well, saves a lot of money, and when we were students we were the envy of our friends (when we weren’t actually feeding them!).
I don’t know much about the cost of living where you are, so I can’t comment on $200 a month. I know I don’t spend more than £30 a week (I have no idea exactly how much, but £30 is very much a top-end estimate) on groceries in general, not just food, including sometimes buying lunch for myself instead of making it. And that’s feeding two adults.