I like tipping my hat to people in the food world who do good things (beyond magic in the saute pan). So I can’t resist trumpeting what The Kitchen owner Kimbal Musk is advertising on billboards and bus benches in struggling neighborhoods around Denver. Maybe you have seen them. They say things like: Olive oil and salt, 450-degree oven, 75 minutes, $6. The picture on the billboard? A roast chicken. Other billboards detail how to roast carrots and broccoli.