Farmer's markets are absolute gold when you are trying to eat cheaply. Here in Boston (where the cost of living is fairly high in most respects), I can head down to the farmer's market on Saturday morning, and pick up 100+ lbs of fruit and vegetables for around $20. If you go there in the evening as they are closing up, you can get twice that in remaindered produce, although the choice/quality obviously won't be as good.

Just a note on this, this is very location specific. The farmers market where I am is far more expensive than the store. It's better quality, but you definitely will not save money.

To contrast that, where I am from originally farmers markets can have tremendous deals.

Heh, this sort of reminds me of a show I saw the other day about extremely cheap people(not extreme couponing, it was similar though). One guy would go to restaurants and ask people if he could have their food that they didn't finish. Anyways, I doubt you are wanting to do that, but you could still mooch off of friends/family/strangers!

My problem with your post is the price range. There's a million healthy things I could make that would rock your world. But vegetables and fruits and good sources of protein aren't cheap. I mean I make a stir fry with cabbage and spices and meat that could feed you for a whole day, but you're going to pay around $10-$15 just for that, and it's all you'd eat that day.

Ignoring healthy and good food the tried and true ramen diet works if you are young. 9 cent ramen * 3 meals a day * 26 days = 7.02 USD. Done and done. Given your budget that 3 * 26 - 7.02 = 70.96 USD left over enough to eat out a few times if your like to dine well. I recommend steaks since ramen is a poor source of protein.

Ahhaha-
I had been living on around 2 euros per day (including coffee, occasional cookies, 2 beers per week) in Finland for a year, which is not the cheapest country around. I was a bit thin but i was healthy.
Lots of potatoes, onion and vegetables, some milk and eggs, flour and only a few meat. Muesli (you can get no-name muesli for 1/10 of the price of some of the popular brands) with milk every morning and no bread at all. I could make pretty much anything from flour and/or potatoes. The price range is so wide for food. I could buy the same but nameless ("Tesco-style") flour for 1/5 price. Same for potatoes. Ugly potatoes for 1/5 price of the fancy ones. Sure, i had to cut out 1/5 of the pieces, but still was a lot cheaper.

I was able to live for 2-3 months on 1.5 euros per day (no beer, no cookies, lots of passover).

And I still miss those meals. Onion cream-soup, Broccoli cream-soup mmm. Stewed vegetables and mashed potatoes with meatballs. mmmmm. Fried potatoes with butter and milk and a lot of other stuff. I hate macaroni and cheese. Fortunately, cooking is so easy (and quite fun) so i never had to eat that shit.

Of course, eating out was a no-no. 2 cheeseburgers for 2 euros (which is the cheapest thing you can find) is too expensive.

a piece of toast between 2 pieces of bread (recent news story)
I eat a can of baked beans (or two) most mornings, cost 69c NZ (~35euro cent) each

make your own bread (I do) nz dollars (so euro's about the half)
5 kg flour $7
1 pack of yeast $2.50
teaspoon sugar ~50c
water

this will make enuf bread for a person for a month (add a teapson of oliveoil and make a pizzabase)
I can give you a simple recipe that will always work (if you're serious)

Ditto the ramen diet. When I was in college, I did Brand X cereal for breakfast, ramen for lunch, and boxed pasta for dinner. Wasn't exactly healthy, but I was also spending like no money on food.

I just saw Portlandia for the first time last night and this topic made me think of this. Not practical, of course, but, after seeing it, you won't have an appetite for the next month. So, I just saved you a ton of money! You're welcome. =)

Lot of good suggestions, especially way2lazy's (not letting me rate up at the moment =/) but I'd steer clear of the Ramen. There's sacrificing some quality and then there's sacrificing your self-respect. Besides that, you mentioned you're looking to keep it healthy and that's pretty far from it.

Eating out is going to be the big challenge. About ten years ago, I was living in San Antonio, TX and was on a strapped budget AND had to eat lunch/dinner at the office (long hours). I found a Mexican place that made enormous burritos for around $2.00-$3.50. You could eat half and be full. So, that was my lunch and dinner... every day. Take a look around the area and if you can't find something within budget, try shaving down your cooking budget to make up for it. Otherwise, you may need to look into alternatives. =b