We run into problems becuase the hubby is 6'6" and works construction, so he needs 3,500-4,000 calories a day to not lose weight. He also has some dietary issues that restrict carbs, so we eat very little potatoes or other starches. So, we don't eat as cheaply as some folks do, but we do a decent job. He's discoveredt the joys of lentils (we buy red, green, and french for variety), and is now making lentil soup and faux falafel regularly.
You can also maybe try TVP (textured Vegetable Protien) in place of
meat, or to stretch it out. I get it for about $1.49/lb, which is a
*lot* of TVP once it's hydrated with anything. It's also a great
snack--I eat it with some fruit or yogurt, or with some nuts (munch on
it like granola).
Also, the better quality the food, often the
less of it you need to be fulfilled. A good example is chocolate. I
LOVE chocolate, and I've learned that one $2-4 bar of Scharffen-Burger
will last me weeks, while a Butterfinger will last me about 5 minutes.
The initial outlay is more, but I am more satisfied for far longer; so,
it's cheaper in the long run. (To be fair, I don't eat either all that
often). I find this is true with a lot of things: eggs, tomatoes, greens, meats. Experiment to see what quality of food is the best value for you. Cheapest up front is not alwas the most frugal, if you end up having to use more of it. Expensive doesn't always mean quality.
There are certain things I don't buy for moral and health reasons, like Tysons chicken (worst possible for growth hormones and living conditions). That, too, means more expense. Instead, we make up for it by buying direct from local farmers in-season and freezing it. Sometimes, we can even trade for things (we bake, and I am Chef and cheesemaker). I also get all my eggs from a local farm, and get free-range, natural eggs (they're organic, but can't afford the Certification process unless they want their eggs to be $5+/dz) for about as much as store eggs. I also try to stick to the Sustainable Seafood list, which eliminates much of the cheaper fish from our diet. Instead, I'll use the fish I do get in a stir-fry, or other protien-stretching dish. My hubby and I made the decision to not shop at Wal-Mart, especially after their "organic" scandal, which does sometimes mean paying higher prices elsewhere (I am not saying you shouldn't shop there, it is a personal decision for us).
It's difficult to eat healthy, sustainably, morally, and frugally; but, it is possible. A lot of eating frugal and healthy is planning ahead. We do a weekly meal plan, with quicker meals or crock pot meals on days we're not going to have a lot of time at home. We make meals with leftovers, so we can take lunch. We schedule our shopping time, and prioritize going to markets or farms directly--it's often a "date" kind of thing for us. As a Chef who specializes in nutrition and sustainable foods, I also do a lot of research on nutrition values and differences (Organic isn't always the best option, as with some fruits) and adjust accordingly.
"This isn't life in the fast lane, it's life in oncomming traffic." -Terry Pratchett