This article is from the Children Allergies and Asthma FAQ, by Eileen Kupstas Soo email@example.com with numerous contributions by others.
This is hardly a recipe; just an idea that works.
Canned coconut milk
Thin the coconut milk until you get the consistency you need. About
equal water will get a reasonable milk substitute. The coconut taste
isn't very strong after cooking, surprisingly enough.