ExpressJS without Jade - inject data directly to HTML files

I'm using ExpressJS with normal HTML templates (no Jade or similar template engines). Since I'm about to add MongoDB to my App, I need to inject data in to my HTML files. I know that it's no problem when I use Jade or similar template engines. Is it possible to directly inject it to my HTML files without using Jade? If not, is it possible to use Jade and still having my HTML files?

Here is my app.js:

var express = require('express');
var server = express.createServer();

server.configure(function () {
  server.use('/bootstrap', express.static(__dirname + '/bootstrap'));
  server.use('/css', express.static(__dirname + '/css'));
  server.use('/js', express.static(__dirname + '/js'));
  server.use(express.static(__dirname + '/html'));
});
server.set('views', __dirname + '/html');
server.register('.html', require('handlebars'));
server.set('view options', { layout: false });
server.use(express.bodyParser());
server.use(express.cookieParser({ secret: "keyboard cat" }));
var memStore = require('connect').session.MemoryStore;
server.use(express.session({ secret: "keyboard cat", store: memStore( {
  reapInterval: 60000 * 10
})}));

server.listen(1337);
console.log('Express server started on port %s', server.address().port);

/** SESSIONS **/
function requiresLogin(req, res, next) {
  if (req.session.user) {
    next();
  }
  else {
    res.redirect('/login'); // TODO: process redirect
  }
}

var pseudoUsers = require('./users');

server.get('/login', function(req, res) {
  res.render('login.html');
});
server.post('/authenticated', function(req, res) {
  pseudoUsers.authenticate(req.body['emailInput'], req.body['passwordInput'], function(user) {
     if (user) {
       req.session.user = user;
       res.redirect('/dashboard');
     }
     else {
       res.redirect('/login?wrongCredentials=true');
     }
  });
});

/* ROUTERS ****************/
/**************************/
server.get('/home', function(req, res) {
  res.render('index.html');
});
[some more routes..]