I've never tested this myself, but according to the Wikia page, it should work.
"Minions can stand in for any resource, even if the skill plot for that resource has not been built. This is most likely to arise in a tier 6 citadel that has yet to build a barbecue. Minions gathered can still be used for rations, provided that the above conditions are met."
The above quote is from the bottom of this page: http://runescape.wikia.com/wiki/Minions~ Sicariu