You need to download and install plg_nsrecipes_komento plugin to make it work.
Download and install NS Recipe's Komento Integration plugin.
Go to Extensions > Extension Manager, install plg_NSrecipes_komento zip archive.
Go to Extensions > Plugin Manager, look for the plugin and edit it.
This plugin has no configuration options.
There is nothing special to achieve. You just need to enable comments on NS Recipes.
Go to Components > Komento > Integrations and click on NSrecipes item (COM_KOMENTO_COM_NSRECIPES).
Then, go to the "Advanced" section and toggle to "plugin."