Broil red peppers 6 inches (15 cm) from heat, turning often, for 20 minutes or until charred. Let cool; peel off blackened skin. Quarter, core and seed; cut into 1-inch (2.5 cm) wide strips. Place in bowl. Whisk together oil, vinegar, sugar, salt and pepper; toss with peppers. (Make-ahead: Cover and refrigerate for up to 24 hours.)
