WP Options Page Setup with button to run action

gistfile1.php

<?php

function create_menu() {
	add_options_page(__('Plugin Settings', 'ejda'), __('Plugin Settings', 'ejda'), 'manage_options', 'ejda-slug', 'options_page_content');
}
add_action('admin_menu', 'create_menu');

function options_page_content() {
?>
<div class="wrap">
	<h2><?php _e('Amazing Plugin Settings', 'ejda'); ?>
</div>
<form method="post">
	<input type="submit" value="<?php _e('Submit', 'ejda'); ?>" />
	<?php wp_nonce_field('ejda-action', 'ejda-nonce-name'); ?>
	<input type="hidden" name="ejda_action" value="give_horse_a_horn" />
</form>
<?php 
}

function request_handler() {
	if (isset($_POST['ejda_action'])) {
		switch ($_POST['ejda_action']) {
			case 'give_horse_a_horn':
				// Check nonce
				check_admin_referer('ejda-action', 'ejda-nonce-name');
				do_magic();
				break;
			default:
				break;
		}
	}
}
// Run after init 10 to catch anyone registering post types and taxonomies at init 10
add_action('init', 'request_handler', 11);

function do_magic() {
	// Magic
	error_log('There\'s magic going on here');
}