How can I execute a task on one background thread.

I am using the following code to run stuff on another thread.

       	AsyncTask(ENamedThreads::AnyBackgroundHiPriTask, [parameter]()
       	{
		//my code here
	}

This will run code on any number of background threads created by the task graph system.

However I would like to run my code off the game thread, but on just one background thread. not multiple background threads.

How could I do this?