Celebrity chef Jamie Oliver has been trying to make a difference in the nutritional quality of the UK's school lunches for years. Now, Oliver is focusing on another area that needs improvement -- the typical British home. He worries that the tough economic times are further degrading the quality of food served at home.

When Oliver was first zeroing in on school lunches and teaching cafeteria workers to prepare fresher, more nutritious meals, he didn't just encounter resistance from kids. In one South Yorkshire town, cameras caught parents of school children shoving burgers and fries at their kids through the school's fence. So now Oliver is working in that town and trying to teach families how to eat healthfully on a tight budget.

Oliver makes a good point: Historically, when money was tight, people had to become more resourceful -- growing their own produce, using cheaper cuts of meat, and so forth. Now, however, people have the option of buying $0.79 boxes of macaroni and cheese or value meals at fast food joints. Have you seen that recent commercial for KFC? The one that challenges people to buy the ingredients for a bucket of chicken for less than they'll sell it to you? That's just the point the Oliver is making -- when convenience and cost pair together, some people will let nutrition slide.

If you're trying to lower your grocery costs, try these tips for eating healthfully on a budget.