WINDOW ROCK — As Char Kruger slowly adds cornmeal to the blue-corn mush on the stove, stirring it clockwise, people begin asking questions. Should they roast cornmeal before making the blue-corn mush?

It’s a simple snack of cornmeal, butter and milk, yet the humble cornbread sparks heated debates across the country. What’s the best way to prepare cornbread, and how should it be served? From state ...