What if I told you one of America’s most essential sandwiches was right here in St. Louis? That’s right, Schottzie’s fried brain sandwich is one you must eat before you die, according to Thrillist, a food and drink website. “Brain sandwiches are a tradition in St. Louis so endangered, they’re like the white rhino of lunch,” said Andy Kryza, Thrillist Food/Drink senior editor and Kevin Alexander, Thrillist Food/drink executive editor. Schottzie’s fried brain sandwich is made with…