Best mondongo in Miami is at Los Balkanes Bakery. There's one just south of Palmetto Hwy (826) on Red Rd (NW 57th Avenue).
Haven't tried it yet-it will have to be pretty freakin good to beat what I got, though.
Vienna beef dogs are best when they are actually polish sausages, and then sliced diagonally and deep fried. This is how I used to get them in chicago. damn!