I have made Ratatouille three times now.
1) Pre-movie. At least 4 years ago. I did not like it..and I don't recollect where I got the recipe.
2) Post-movie. 1 year ago. I used the Cooking for Engineers version. There is some debate that the "real" way to make Ratatouille involves cooking each vegetable by itself to preserve the individual flavors (as done in Julia Child's Mastering the Art of French Cooking Vol. 1) before combining at the end. The Engineers recipe is not done this way. But I still recommend it. It was most delicious. DH thought so too.
3) Post-movie. 4 days ago. This time I tried Julia Child's version. It turned out really well. I can't remember how the one last year tasted in comparison, but DH claims that he does and that the French version is better. So, there you have it.