The basis of this theory is that two separate scenes, one showing Remy learning to cook, and another showing Anton Ego remembering his childhood and his mother, appear to take place in the same kitchen.
One interesting fan theory is that Remy and Anton Ego are connected, and that Remy learned to cook in the same house where Anton grew up.
It’s also the story of a young chef named Linquini and a restaurant critic named Anton Ego.
Pixar’s Ratatouille tells the story of a rat named Remy that loves to cook.