recommendations near The Westin Colonnade, Coral Gables, please
I've not yet been for dinner but have had several good lunches at Bulla (formerly Por Fin) and I'm sure dinner is just as good. Pascal's on Ponce is reliably good French food - not quite high-end, but more upscale than a bistro. Graziano's does very good Argentine parrillada and also has a very good wine list. It might be a bit of a stretch for a walk (about a mile), but Eating House has lots of fun, creative dishes and is another good option.