Turkey-Bacon-Cheddar-on-Pretzel-BreadAn excerpt from USA Today:

So many restaurants already have jumped in — and some, out already — that pretzel buns are almost becoming common. Blimpie got into the action by putting pretzel bread on its permanent menu in June. Sonic rolled out a Cheesy Bacon Pretzel Dog over the summer. Last month, Ruby Tuesday rolled out four different pretzel burgers and Dunkin’ Donuts introduced a Pretzel Roll Roast Beef Sandwich. Red Robin just brought back its
Octoberfest Burger served on a pretzel bun. Even Starbucks has a Stoneground Dijon Bavarian-Style Pretzel — with the mustard inside.

USAToday.com – Pretzel mania spreads from fast food to every food