The one thing you have left over when canning tomatoes are the skins. Here is an idea to make use of the skins - Tomato skin powder. You season, dry and pulverise the skins to sue as a seasoning!
I'm canning tomatoes tomorrow and will give it a try.
food52.com
I'm canning tomatoes tomorrow and will give it a try.

The Scrappy Tomato Trick We're Obsessed With This Summer
Bonus: It'll help you enjoy those ruby-red beauts long after tomato season is over.