gistfile1.txt

Router.handlebars = function(options) {
  options = options || {};
  options.data = options.data || {};

  if (! options.template)
    throw new Meteor.Error("Router.handlebars: options.template is required");
  if (! options.path)
    throw new Meteor.Error("Router.handlebars: options.path is required");

  return {
    where: 'server',
    path: options.path,
    action: function() {
      var data = _.isFunction(options.data) ?
        options.data() : options.data;
      this.response.writeHead(200, { 'Content-Type': 'text/html' });
      this.response.end(Handlebars.templates[options.template](data));
    }
  };
};

Router.map(function() {
  this.route('test-handlebars', Router.handlebars({
    path: '/test-handlebars',
    template: 'test',
    data: function() {
      return {
        test: 'World!'
      };
    }
  }));
});


<h1>Hello {{test}}</h1>