What you can do is write a review that is so incredible positive, that the irony is so obvious that nobody will miss it. I don't have the time, and don't have the inspiration and my ironic food dictionary is offline at the moment. So if anyone can think of a review of Il Giardino [tripadvisor.fr] that will make me really curious - go ahead and make my day!
Uh, this is the interwebs where there exists a near-singularity composed entirely of missed obvious sarcasm & irony. It's similar to Relativity theory regarding the increase of energy required as a mass is accelerated to a significant fraction of C. The amount of irony and obviousness required would approach infinity and might even cause a tear in the very fabric of the Multiverse itself.
Besides, this is France we're discussing. If the review causes the French restaurant to be swamped with too many customers in the judgment of the restaurant and the court, you might get sued for damages because of a *good* review!