Invoking a utility method from JSF tag

I'm attempting to invoke a utility method from JSF tag and pass it a backing bean property, something like:

<h:outputText value="#{bean.property}" rendered="#{utility.booleanMethod(#{bean.property})}" />

I'm getting EL parser errors for the above -

Caused by: org.apache.commons.el.parser.ParseException: Encountered "(" at line 1, column 38.

Is there any way to accomplish this ?

[420 byte] By [Ori_Kremera] at [2007-9-25]