As summer fades into fall, kitchens everywhere start filling up again, ovens finally getting used for something other than reheating leftovers, the smell of baking replacing the smell of a grill. A controlled trial published in Frontiers in Nutrition, studying 657 adults over 7 weeks, found that a structured cooking program measurably improved both mental and general health, along with people’s confidence in the kitchen and their ability to shif…