For dinner and real meals, go to the library and check out some cookbooks. I'm sure they have a bunch of healthy recipes.
For lunch and quick food, yogurt is a good choice. Stores usually have at least one brand on sale each week ($.40-.50/cup). They're low in fat, high calcium/protein and come in so many flavors you can have a variety.
Also, eggs are great for diet and budget. You can often get a dozen large for under $1.00. If you hard boil them and only eat the whites, you get all of the protein with none of the cholesterol. Slice the egg whites and include them in a salad. Throw in some "good fat" like avocado or olives, if you like them. That's the great thing about salads - anything goes.
Of course, I should take my own advice because I'm always trying to lose 20lbs, so take this with a grain of salt...(no pun intended).
