Replying to your (deleted?) comment:

Confit Byaldi closely resembles a tian on purpose. Michel Guérard originally developed it, and it was then modified to its current (and most common) form by Thomas Keller, who served as the culinary consultant for the 2007 Pixar film Ratatouille. This version of the dish was made famous by that very film.

OP even said this was ratatouille, not a tian. That's context clue #1. OP most likely searched for recipes for ratatouille and found Confit Byaldi, which is what this is.