I've found that if I soak and cook black beans (or any other color) and if I cook healthy long grain rice, I can make several meals out of them by pulling what I need out of the containers in the fridge. Some may say that it takes a lot of fuel to cook both of those, but really, I make several meals out of the one cooking, and the canned varieties of the beans have a lot of sodium in the can and the instant variety of the rice won't hold it's texture, so I use the real deal.
Then I put them precooked in several small individual sized containers, as many as they take to fit in the little fridge.
If I want fried rice, I have rice ready for that.
If I want to make chili, the beans are waiting in the fridge.
If I want to make a bean and rice burrito, I have stuff ready for that.
If I want to have spicy beans and rice with cheese melted on top in a bowl, I've got some salsa and cheese in the fridge too.
I like Spanish rice, and if I want to do that, I have some green peppers and some other goodies in the veggie bin.
I'm not a vegetarian, so I can add meat, fish, and eggs and spices and whatever for variety. Add a small salad or other greens, and you have a meal. But no matter what I choose, the cheap beans and rice I cooked make for good eating all week long and they cost little and extend the meal. Also when you eat beans and rice together, it creates a vegetable protein that's pretty healthy. There's a lot of fiber in beans to keep you regular and the two ingredients cost so little.
The other thing is a snack cake. I want something a little sweet with tea sometime in the day. I'm not of English extraction, so I don't know where it came from, but I just like it. So I have a "tea time" and I buy at Walmart a box of 12 cupcakes that look EXACTLY and taste EXACTLY like hostess cupcakes. They are just called "Chocolate Cupcakes" and they are near the dairy aisle with some other bulk boxed hostess like treats; they were not over where the Hostess stuff is. The whole box is $3. Here it is on their website. They say out of stock for shipping, but our store has them all the time:
https://www.walmart.com/ip/Snacks-Chocolate-Cupcakes-2-oz-12-count/10448161 They are individually wrapped. I look at the date and if I see that I can't eat one a day before they go, I'll put that number in the fridge or freezer, because I eat one a day. That's 25 cents for a delicious chocolatey treat that I didn't have to bake and cures my sweet tooth.
I haven't figured out exactly how much that comes to a day for my meals, but I doubt that I spend over $4 a day. I should cipher that out and see. One thing that helped the budget was stopping soda. I used to go through cartons and cartons of diet soda, and I quit that and now opt for tea or water. Occasional, but not daily coffee.
Dollar Tree has frozen chicken, rib eye, tilapia, salmon and hamburger patties for a dollar a packet. You get 2 frozen hamburger patties for a dollar. That will make a couple meals with the beans and rice or for chili or whatever. The patties are good. The chicken I've never tried. 1/2 the rib eye makes a good steak for steak and eggs. Eat the other half the next day. The fish is EXCELLENT. I make a microwave dinner out of it. Veggies (and beans and rice) on the bottom, a few drops of olive oil, a LOT of blackened seasoning on them (no salt) and put the fish on top and coat the top heavily with blackened seasoning. The seasoning gives it a crust which often you can't achieve in a microwave.
Then cover it with saran wrap and microwave till it's done, which depends on your microwave. You can do the same thing in a campfire foil dinner or in an oven. I put it all in a pyrex dish and it's a meal with low sodium where you don't miss the salt. The blackened heat is awesome.
Food doesn't have to be expensive. And cooking the beans and rice once a week really helps me anyway.