I've mostly adapted what others have mentioned elsewhere on these forums. I eat plenty of legumes and rice, and I add whatever's available in the garden (squash, peppers, greens, beets) to the stew type thing I generally make with legumes and put it over rice. I bake breads to snack on (to make two decent sized loaves of basic bread that provide snacks for nearly a week it takes maybe $1 of flour and $0.25 of electricity with my electric oven and sourdough starter, the flour required to maintain the starter is included above). I'll also occasionally make sweet breads or cookies, and I use excess sourdough starter to make tortillas. When there were plenty of tomatoes during summer I made pizzas and pasta sauces.
I never eat out (well, almost never, and the two or three times I have I paid with cash so they might have been overlooked in the totaling). I buy many of the basics in bulk: 25 lb rice (~0.35/lb), 25 lb unbleached flour (~0.38/lb), 10 lb rolled oats (~0.79/lb), 10 lb shredded cheese for pizza ($1/lb). I get some other items when on sale or I bike to a market 10 miles out in the middle of nowhere (it's next to a freeway, but it's outside of town where land is cheaper so they can sell things cheaper) for 2~4 lb or so of lentils/pigeonpeas/blackeyed beans (~1.20-1.50/lb), onions (~0.33/lb) and fruits (apples, persimmons, oranges...whatever's in season and on sale). Pinto beans are really cheap, but I don't like the flavor as much and they lead to more flatulence in my experience. I buy pasta when it's on sale, and occasionally some kind of meat. I buy bulk bagged spices at an international market.
The garden is maybe about 500 square feet, and it's shared with four people. We grow chard, beets, peas, beans, tomatoes, peppers (sweet and hot), kale, scallions, onions, eggplant, summer squash, winter squash, carrots, and various herbs. We start everything from seed. I can't really say how much of my food is from the garden, but definitely at least 90% of the vegetables are from the garden, and I pretty much only buy vegetables when they're on sale.
Mostly I eat some sort of oat mush with seeds as a staple breakfast, a legume mush with rice as my staple lunch, and either some sort of, generally, different legume/meat mush or something exciting and not mushy for dinner.
I hope that answers at least some of your questions. Let me know if you have any more.