How many people do you have to feed? I only have $50/ week to spend for groceries for my husband and myself. Thus, just about everything we eat is cheap!
Some of our favorite recipes:
1 can of Chili Magic (may need to ask someone at your grocery store to help you find it)
1 can of any type of beans--we change it up: chili, northern, black beans, even chickpeas
1 can diced tomatoes any flavor
1 pound 95% lean ground beef, turkey, or chicken
Lots of diced veggies-whatever you have on hand, mushrooms (can be fresh or canned), onions, green bell peppers, carrots, corn are all reasonably priced-I rarely use the same combination, if you finely dice the veggies you can even sneak in some less conventional veggies like brocoli!; serve with a small servering of brown rice and reduced fat cheese sprinkled on top, this lasts us forever, so I usually freeze some in individual servings to be reheated in the microwave when we are in a hurry
Another...follow direction for your favorite noodles (mine are the shells)-you can use whole wheat if you please; stir in cooked frozen spinach-we started out with just a little but as we got used to it, we've added more and more; then again, saute and add whatever veggies you have on hand-peas, mushrooms, bell peppers, green onions, yellow onions, brocoli; top with a low fat/fat free marinara sauce and a tiny pinch of parmeasan cheese
"Potato Bowls"
Bake a potato in the microwave, cut in 1/4's, place each 1/4 in a pasta bowl or individual serving bowls and mash with a fork into pieces, top with cooked brocoli and baked chicken, then drizzle with teriakyi marinade and pepper jack cheese (You can add variety by changing the marinades, the vegetable, or the cheese)
Salads--so much cheaper is you don't buy the prepackaged options, it does take a little more prep time, but I just prepare one giant salad on sundays (when I am watching Home Extreme makeover, Oprah's big give, and the newlyweds!) and then we eat it slowly through the week.
I've adapted so many quick and easy recipes that work for us. When we started out, I have to admit that we put a lot more cheese on these recipes than we should have, but I've slowly cut back. Good Luck with experimentation!