Add record count to menu

Manual is usually a good place to start:

https://xlinesoft.com/phprunner/docs/menu_item_modify.htm

First place I went to, but it is not a very good manual as in very hard to understand what to do when you haven't done it before.
I have vertical menu. At the top I want to display Number of Recipes: 202
Do I add a snippet?

Do I just use php syntax?

If I use a snippet where and how do I place it?
Thank you