I've lived in California, Montana, Washington, and South Carolina (my home for the past few years). I've spent a ton of time with family in the Midwest and the Ozarks. So not everywhere, but a good cross section!
I'm not sure I made a generalization about America besides the quality and diversity of supermarket food, and an anecdote about how many of my friends cook at home.
I'm not sure I made a generalization about America besides the quality and diversity of supermarket food, and an anecdote about how many of my friends cook at home.