I have been thinking a lot about this very subject recently:
http://well.blogs.nytimes.com/2007/12/05/a-high-price-for-healthy-food/
Our grocery bill is so BIG!! I need to start keeping close track and see just how much we spend and on what. When I go to the store most of what is in our "trolley" is from the fresh section. We don't really buy junk. We buy tortilla chips but almost never any other chips. We don't buy sweets, carbonated beverages or premade/packaged meals.
Here is a picture of Sat. night's dinner before I started it. Most of what it consists of is fresh. There are about $15 + of tomatoes here. Plus 4$ of avocados and $3 of cilantro. the Baguette was from the local Patisserie for $3.90. (that I admit is a luxury. We don't usually buy these either.) Those are just a few of the ingredients, so as you can see this meal was actually quite expensive. Here is what I started with:
These are the roasted tomatoes.
This is my taste tester. She whines in the kitchen as I cook and wants to taste everything. She is chowing her second cucumber right here. She loves cucumbers.
Tomato soup with Creme Fraiche and basil (sad wilted basil by the time I got the picture).