Among the many snacks you can find in the aisles of Trader Joe's is an icon of sweet and salty goodness: the peanut butter pretzel. It's a combination so tasty, famed food writer Ruth Reichl once raved, "You haven't lived until you've tried the two together." But the beloved treats aren't just treasures for the palate -- they're a pretty lucrative business worth millions of dollars. And now, Trader Joe's is being sued for allegedly cornering the market on the snack.