Answer: Remy, Colette, and the rat clan
As everyone who works in the restaurant gets ready to serve dinner, Linguini is upset because he does not know how to cook at all. Remy is not present because of the argument they had. Anton Ego is waiting for his dinner, and there is no way that Linguini will be able to serve him anything that will get a good review for the restaurant. After being questioned by his restaurant staff, he confesses that he does not cook. At this point, Remy walks in and the two make up. Linguini then informs the staff that a rat has been the genius cook for the restaurant, and all the employees quit immediately. Colette reconsiders, however, and returns to the restaurant in time to help Remy prepare the ratatouille for Anton Ego. To make up for the lack of other staff, Remy's rat clan aids in the food preparation, and Linguini takes over the job of server since he is not qualified to be a chef. Dinner goes smoothly, and Anton is pleased with the dish he is served.