The Source chef Scott Drewno has already snagged the prestigious title of D.C. Chef of the Year. Now he’s picked up two more honors to add to his collection: at the American Institute of Food and Wine’s 5th annual “I Love Crab Cakes!” competition on Monday at Phillips Seafood at the Southwest Waterfront, Drewno’s riff on a BLT sandwich won him both the people’s choice award and top honores from the judges’ panel of D.C. chefs and food journalists.