Recent posts

I would like to add three recent posts on my homepage.
Now I have a piece of code. I just want the code for the featured image . we can help me?

<ul>
<?php
	$args = array( 'numberposts' => '3' );
	$recent_posts = wp_get_recent_posts( $args );
	foreach( $recent_posts as $recent ){
		echo '
<li><a>' .   $recent["post_title"].'</a> </li>
 ';
	}
?>
</ul>