Change a gameObject property at runtime from another thread

I'm trying to update a TextMesh's text property at runtime from a separate thread (as a Task). However, I get the following errors.

 System.ArgumentException: set_text can only be called from the main thread.
 Constructors and field initializers will be executed 
 from the loading thread when loading a scene.

If it's helpful, here is a representative sample of code:

 private void FetchStuffAsync(){
   var query = ParseObject.GetQuery("Blah");
   query.FindAsync().ContinueWith(t => {
     IEnumerable<ParseObject>  results = t.Result;
     foreach(ParseObject ob in results){
       myTextMesh.text = "blahblahblah";
       break;
     }
   });
 }

Do I have to wrap the TextMesh in a separate class and carry out the update through its methods? How can I change the text as soon as I get the information?