Self-relationship doctrine

I'm using Doctrine, and now I have the following problem.

I'm doing a system registry, where it can have multiple "children" and their "children" can also have "children", and so on.

How will I achieve this self-relationship with the doctrine?

I have already mapped the Menu class to the annotations , but I could not figure out how to do this mapping in the query, so when I perform the search the menu object will already be filled with all the items correctly.

Below is the mapping I made in the Menu class:

/**
 * @ORM\Entity
 * @ORM\Table(name="tb_Menu")
 */
class Menu
{
    /**
     * @ORM\Id
     * @ORM\GeneratedValue("SEQUENCE")
     * @ORM\Column(type="integer", nullable=false)
     * @ORM\SequenceGenerator(sequenceName="sq_Menu")
     */
    private $id;

    /**
     * @ORM\ManyToOne(targetEntity="Menu", inversedBy="menuFilho")
     * @ORM\JoinColumn(name="idMenuPai", referencedColumnName="id")
     */
    private $menuPai;

    /**
     * @ORM\OneToMany(targetEntity="Menu", mappedBy="menuPai")
     */
    private $menuFilho;

    /**
     * @ORM\Column(type="string", length=30, unique=true, nullable=false)
     */
    private $titulo;

    /** 
     * @ORM\Column(type="string", length=80)
     */
    private $descricao;

    /* 
     * Construtor
     */
    public function __construct() {
        $this->menuFilho = new ArrayCollection();
    }
}