What Do You Feed A 2 3 Week Old Kitten?

What do you feed a 2 3 week old kitten?

I have a 7 month old kitten that I’m trying to teach how to use the litter box. What kind of food should I be giving it? And what kinds of things can I put in with its water if there is no milk replacer as yet used as well as canned cat food and Purina Cat Chow. This is not my own but from an email from someone else who has been given this task by their vet…help!