Jetpack Featured Content: Displaying posts from a specific category

I checked out your guide on using Featured Content here: https://jetpack.me/support/featured-content/

This is how I obtain the content tagged as featured and subsequently display it:

$featuredContent = mytheme_get_featured_posts();

What is the best/most efficient way to show featured content from a specific category, perhaps provided as a parameter in an archive template?

https://www.ads-software.com/plugins/jetpack/