Apparently the home of the world's largest Pork Tenderloin sandwich is in St. Olaf, Iowa! Ingredients? Pork Tenderlon, bun. (but the bun is mainly for decoration)
From: http://www.startribune.com/blogs/websearch/?cat=26
Yum! The “world’s largest pork tenderloin” sandwich (pictured)at the St. Olaf Tap in St. Olaf, Iowa, practically covers a dinner plate. The bun is apparently just a decoration.
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