Photo-Illustration: The Strategist; Photos: Retailers In our advice column, “ Ask the Strategist ,” we take your most burning shopping questions and survey friends, call up experts, and draw on our own personal experience to answer them. If you have an online-shopping question of your own, please send it to strategist@nymag.com with the subject “Ask the Strategist.” We’re here to help. Best vessel for roasting a turkey? A traditional roasting pan works fine, but it’s also big and bulky and, I