If you know this, you had a good time

It's Ratatouille, the dish. However, it is referencing the movie of the same name.
This is enforced by the rat included in the picture, because the main character of Ratatouille is a rat.
@captain_obvious you're late on the draw

I LOOKED AT THIS DISH AND WAS ALL 'oh hey I like that movie' AND ONLY AFTER SEEING THE COMMENTS DID I NOTICE THE RAT I AM BLIND.