Node.js: Using multiple moustache templates

I'm trying to break a moustache template up into various components so I can reuse them, and get the assembled text returned through node.js. I cannot find anyone that has done this.

I can return must ache pages imply with:

function index(request, response, next) {
    var stream = mu.compileAndRender('index.mu', 
        {name: "Me"}
        );
    util.pump(stream, response);
}

I just cannot figure out how to render a template and use it in another template. I've tried rendering it separately like this:

function index(request, response, next) {
    var headerStream = mu.compileAndRender('header.mu', {title:'Home page'});
    var headerText;

    headerStream.on('data', function(data) {
       headerText = headerText + data.toString();
    });

    var stream = mu.compileAndRender('index.mu',        
        {
            heading: 'Home Page',
            content: 'hello this is the home page',
            header: headerText
        });
    util.pump(stream, response);
}

But the problem is that the header is not rendered before the page and even if I get that to happen. The header is seen as display text rather than html.

Any help appreciated.