If Florissant is not on your radar for outstanding Thai cuisine, Thai Kitchen(8458 N. Lindbergh Boulevard, Florissant; 314-695-5039) is about to change that. Fans of owner Andie Ongartsutthikue's cooking — and there are quite a few — might recognize the restaurant's name; the not-quite two month-old spot is the second location of a popular O'Fallon eatery.…