With so many Europeans living, breeding, and cooking in our midst, South Florida eaters expect ethnic authenticity at our ethnic restaurants. In this regard, Old Heidelberg exceeds on every front. From the voice and smile of the hausfrau hostess, the spaetzle that tickles going down, frost-rimmed glasses of Tucher Weissbier or Diebels Alt, to the dark pine and leather interior, Old Heidelberg's old-country charm is far from forced. The owners' names are Dieter and Heidi, for crying out loud. Almost every night, Ingo Froehlich transforms the accordion from the second-most-hated instrument into an oompah-pah sine qua non. Bavarian comfort food is succulent and sizably portioned, so this means you'll leave completely stuffed, possibly from the pork tenderloin with a crisp layer of fat just as crunchy as a chicharron. Maybe from roast suckling pig or the bratwurst platter. Maybe from that final, ill-advised bit of Black Forest cake. But at least your indigestion will be well-earned.