(TrendHunter.com) The Burger King Southwestern King Sandwich is a new menu item being launched by the brand at its locations in Canada that will provide patrons with a satisfyingly crunchy option to try out. The... (TrendHunter.com) The Burger King Southwestern King Sandwich is a new menu item being launched by the brand at its locations in Canada that will provide patrons with a satisfyingly crunchy option to try out. The...