Great British Baking Show's Martha Collison offers her veteran advice for amateur bakers

Martha Collison was a breakout star in season one of the Great British Baking Show (that’s the American PBS broadcast of the BBC’s Great British Bake Off, of which Collison appeared on the fifth series). Even among a sea of polite contestants, the then-17-year-old—the youngest-ever GBBS contestant—was among the most…