Sorry for the delay in getting back to this.
As mentioned above, we don't have any Open Graph plugins specific for either Community Builder or YooRecipe. An Open Graph plugin is what makes it possible to automatically post an action when a user 'does' something as that hooks into those systems at a lower level, like when a recipe is saved or the actual joining of a group is saved to the database.
Without an Open Graph plugin, you'd be able to create a 'button' or something that a user could click to have an action posted to the wall on their behalf. So, for a Recipe, you could have an "I cooked this" or "My Favorite". For a Group, you could have a button like "I recommend this group" or even "I joined this group".
To create a button like above, you'd want to install and enable the Open Graph - Custom plugin. Then, go into the Open Graph area of JFBConnect. In the Objects area, create a new object with the following settings:
Name: Recipe
Type: recipe
Built-In: Un-checked
On the right side parameters for the query string, you'd enter something like:
option=com_yoorecipe
view=recipe
I don't know what the actual URLs for your recipes look like, but hopefully that's close.
Then, in the Action area, create a new Custom Action with the following settings:
Name: Cooked
Type: cook
Built-in: Un-Checked
Trigger Type: Manual
Make sure the Object is associated with this action at the bottom.
Then, note the ID of the action (likely '1'). On your site, wherever you want the button to show, simply add the following HTML:
<a href="javascript:void(0)" onclick="jfbc.opengraph.triggerAction('1',window.location)"><img src="http://site.com/button-image.jpg" /></a>
That will display whatever image you set above (button-image.jpg) and, when clicked by the user, it should post the "Cooked Recipe" action to the user's wall.
I hope that helps get you started, but if not or you have any questions, just let me know.
Thanks,
Alex