JQuery :: Stop Function - Add Class LI To UL

Is there a function to tell jquery to only do something on the first instance that matches then to stop. For example I add a class to a LI to an UL with the below but it adds the LI to all ULs under it.

$("div#container ul").prepend("<li>Home</li>");
Original code:
<ul><li>
<ul><li>item</li>
</ul></li>
</ul>

Code needed:
<ul>
<li>Home</li>
<li><ul>
<li>item</li>
</ul></li></ul>

Currently Output code:
<ul>
<li>Home</li>
<li><ul>
<li>Home</li>
<li>item</li>
</ul></li></ul>