The concept is so simple I wish I had thought of it: take the throw-away tomato skins that are left-over in the preserving process and make them into something useful. Something other than compost.
With over 80 lbs of tomatoes (and counting) harvested from my garden this year, it is safe to say that I have been knee deep in canning these last weeks. While I am experienced and adept at canning tomatoes in many forms, I had never heard of drying the skins into a powder until I came upon it a few weeks back in Canning for a New Generation: Bold, Fresh Flavors for the Modern Pantry by Liana Krissoff.
Drying the skins is easy. Simply lay the wet skins out onto a parchment or Silpat-lined baking sheet and slow dry in the oven at the lowest temperature setting until they are crisp. I recently ran out of parchment (and my Silpat is too big for our tiny oven. Long story) and used a paper bag cut open. That works in a pinch, too. You can do this in a dehydrator as well, but I put mine away recently and have been too lazy to lug it back out to test.
Once the skins are dry, grind them into a fine powder using a coffee grinder. I have one exactly like this that is reserved for grinding herbs and spices only. A food processor will work, but it will turn out something more like tomato flakes than powder.
The result is a colourful and tangy flavouring that you can sprinkle on top of your meals. So far I’ve used it on breakfast eggs and in ricotta cheese stuffed zucchini blossoms. I’m sure I’ll discover more applications in the coming weeks as the possibilities seem nearly endless.