By default, this feature is enabled. It can be changed any time in "Component Options."
Components > NSrecipes > Options > Main Feature tabs

How does it work?

Each paragraph (ie each time a <p> html tag is encountered), NS Recipes replaces it with an incremental number.

Example

Let's say your recipe preparation steps are:
<p>Chop off onions</p><p>Put them in boiling water during 10 minutes</p>

NS Recipes turns it into:

1. Chop off onions
2. Put them in boiling water during 10 minutes