[chef] 'parameterize' recipies

[erich oliphant < >]

Hi,
I am new to chef, have been through the examples,etc and have quick question.  Running a recipe seems to be 'idempotent', you run it once it does it's thing, if you rerun and the 'target' has not changed it won't do anything.  I am trying to understand how I can use chef for dynamic provisioning.  For instance, I have an apache virtual server template, but I want to be able to run the same recipe but have it create a virtual host at 'foo.domain.com', whose DocumentRoot is '/vhosts/foo', etc based on somehow passing in 'foo' to the cookbook.

-- 
Erich Oliphant

"There are, in fact, two things, science and opinion, the former begets knowledge, the latter ignorance"
-- Hippocrates of Cos