The default home tab is a link to your posts, or static front page if you have one.
Your options are to make a custom menu, the default WP generated menu has the home tab, if you make your own menu it doesn’t have one by default
You could also make a child theme for twentyten and remove this filter
/**
* Get our wp_nav_menu() fallback, wp_page_menu(), to show a home link.
*
* To override this in a child theme, remove the filter and optionally add
* your own function tied to the wp_page_menu_args filter hook.
*
* @since Twenty Ten 1.0
*/
function twentyten_page_menu_args( $args ) {
$args['show_home'] = true;
return $args;
}
add_filter( 'wp_page_menu_args', 'twentyten_page_menu_args' );
https://go.rvoodoo.com/WPchild
is my writeup about why child themes are necessary, etc, if you go that route