How to display image stored as binary data in MongoDB using Mustache in Node JS

I have an image (png) file stored in my MongoDB as binary data. My MongoDB schema looks like below :

var mongoose = require('mongoose');
var Schema = mongoose.Schema;
ImageSchema = new Schema (
{ title : String,
  picture: { content: Buffer, contentType: String }
}
);

The mustache code looks like below:

var template = " <h1></h1>";
var rendered = Mustache.render(template, imageObject);
$('#target').html(rendered);

The data in MongoDB looks like below, it has been shortened as it is too long:

 "picture" : {
                "contentType" : "image/png",
                "content" : BinData(0,"iVBORw0KGgoAAAANSUhEUg ...")
             }

What is the way to convert this binary data to image and especially fit it into the Mustache template for display ?

Thanks.

via A.G.Progm.Enthusiast