That moment comes when the food critic, Anton Ego (voiced by Peter O'Toole, no less!) tastes the food prepared by Remy the Rat. He had come prepared to crucify, but as soon as he puts the ratatouille -- a peasant dish of vegetables -- into his mouth, his eyes get a faraway look, and we see the boy Anton coming into his mother's kitchen to a dish of ratatouille made with her love.
Iron Chef America should tie Jeffrey Steingarten in a chair and make him watch this movie.