Good for you yet cheaper and simple dinners?

I'm trying to keep my grocery bills down. I'm feeding myself, husband and teenage son. I make a lot of chicken and vegetables, and pasta with meet sauce. My son complains that's all I make. Well being on a strict low sodium diet and not a ton a money to spend I need some ideas. My husband and I came up with crock pot ideas, and the many ways we can make chicken, meat and vegetables. Any more ideas? Thanks much for the help!