Canned foods – yea or nay, with Swetha Sivakumar

• Swetha Sivakumar, a food writer and researcher, is demystifying one ingredient every month, in a special HT column. This month: Canned foods. This is a preservation technique that can be traced back to the time of French general and later emperor Napoleon Bonaparte. See why he was so invested in preserving textures and flavours better, for longer (it had to do with his military ambitions). See why your frown as you go down the canned-goods aisle could be very misplaced. And check off a list of elements to avoid.