This sandwich is perfection on a bun. Crispy, flash-fried Louisiana oysters nestled in a soft, brioche-type bun, studded with jalapeno peppers and slathered with sauce. It is crave-worthy indeed. Rachael’s Cafe in Lafayette, Louisiana, is home to this sandwich perfection. Just off busy Kaliste Saloom Road and tucked into a nondescript strip shopping center that’s…