Healthy food costs more than frankenfood. Unfortunate but true. That said, I think you can be a careful shopper and not spend that much more (especially if you factor in all the junkfood you AREN'T buying any longer).
Here's what I do:
1) I shop for canned stuff at something called a Grocery Outlet. They buy up discontinued items, label change stuff and food that's close to "use by" date. They sell if for 40% off. I can generally find 100% tomato paste, 6 oz cans, 4 for $1.00 (just to cite an example). I look for water-packed tuna and mackerel as well as HAIN (a "healthfood" manufacturer) products. I also shop these outlets for non-food items such as ziplock freezer bags (you'll see why in a minute)
2) I buy meat on sale. When I can find skinless, boneless chicken breasts on sale, I buy 'em. When I can find lean ground beef on sale, I buy 10 pounds or more and freeze it in my ziplock bags in servings of 2-4. When fresh cilantro is on on sale, I buy several bunches and after washing, I chop most of it and toss it in the freezer in the ziplock bags. When lemons/limes are on sale, I buy a bunch first I zest 'em (and freeze it) then I juice them in ice cube trays. Then I transfer the frozen juice to ....you got it
3) I check out the 24 hour meat sales, the weekly coupons, and the like.
4) whenever possible, I shop roadside markets. Buying directly from the grower is typically ALWAYS cheaper than buying from a grocer.
5) My garden gets bigger and more productive every year. This year, due to a combination of my own garden's output and lots of lovely produce from local stands, I put up 10 quarts of salsa and 6 quarts of peach salsa. Canning...who knew it could be so satisfying?
6) I buy my spices from the bulk bins at my local health food store. Don't be put off by the price per pound thingie. Two oz (which is the size of MOST spice bottles) will probably cost you less than 2 dollars for most.
7) PLAN AHEAD. Waiting to shop until last minute, without searching out bargains/sales, etc., is recipe for spending more $$ than you need to.
Bottom line...for right now....eggs are pretty cheap and you can make a kick a$$ omelette or souffle. Tasty, too.