Photo by Nikki Buchanan    Sugar Jam, The Southern Kitchen is the inevitable next step for pretty Dana Dumas, who began baking sugar cookies with jam for friends and co-workers when she worked for NASCAR back in the early aughts. Their effusive praise encouraged her to start selling her cookies at farmers markets when she moved to the Valley with her husband over a decade ago, opening her own bake shop near Scottsdale Airpark in...