Bay Harbor might not be on your regular destination list. Perhaps you live in Kendall, Hialeah, or Homestead. But there's one reason you'll want to cross Broad Causeway to this community that stands on what once was a sandbar. It's the golden, flaky croissants served at a small French café owned by Argentine Maria Frumkin. Open Monday through Saturday from 9 a.m. to 6 p.m. and Sunday 9 a.m. to 3 p.m. for breakfast and lunch, the French Bakery boasts cases filled with delicious pastries and breads. The fruit tarts and the truffles will tempt you, but go for the buttery croissants. We like them plain ($1.95), but there are also almond ($3.25) and chocolate ($2.50) varieties. To get the full effect, order your croissant with a latté and sit outside at one of the sidewalk tables.