It was very cute. I believe it was only during lunch at Chefs de France. I remember seeing it back in 2010. When we were at WDW next after that in the Spring of 2013 we didn't do Chefs de France and by the end of that year they stopped - much to our regret.
Here's hoping Remy returns sometime after the new Ratatouille ride opens in France at EPCOT - but that won't be for a several years.