- Author: Lynn Pastusak, MFP Volunteer
- Editor: Shannon Klisch
If you have a garden or compost bin, you probably have plant volunteers. What is a plant volunteer? Any type of plant that grows somewhere you did not intentionally plant it. That's what happened to Master Food Preserver, Lynn Pastusak. Below, Lynn walks us through how she preserved her unexpected harvest so it wouldn't go to waste.
Dehydrating is one of the oldest forms of food preservation and is very easy to do.
Dehydration (drying) pulls out enough water from food to prevent spoilage.
While it is possible to sun dry some foods or even use your oven as a dehydrator, the simplest and most fool-proof method is to use an electric dehydrator. If you don't already have one, I recommend getting one. They are relatively inexpensive, starting around $40 for a simple but reliable model, and they can save you time and money if you plan to start dehydrating on a regular basis. Look for one that has a temperature control setting between 130° and 150° (mine is from 105° to 165°), a fan to circulate warm air evenly, and trays that are easy to load and clean.
The steps for dehydrating cherry tomatoes are easy.
- Wash your hands and clean all your utensils and trays.
- Preheat the dehydrator to 140°F.
- Rinse the tomatoes and remove the stems.
- Cut tomatoes in half.
- Place tomatoes skin side down on a dehydrator tray. If you would like, you can sprinkle a little salt on them.
- Dry for 5-9 hours. Times may vary depending on the humidity and heat in your area.
- After about 4 hours, start checking them regularly. They are done when they are leathery or brittle. If you want to grind them to make a powder, you'll want them crispy.
Tips from Lynn:
Proper storage is critical to keep tomatoes from re-hydrating and molding. A few options I have used: 1) Vacuum seal them and store them in the freezer, 2) seal them in freezer bags, put the bags in tightly sealed jars, and keep them in the refrigerator or freezer. As long as they are in an air-tight container, they can also be stored at cool to room temperature in a dark location - like a closet. For best quality, use them within 1 year.
What to do with your dried tomatoes:
They are tasty to eat alone as a snack. They can also be added to soups, salads, pastas, sauces, and casseroles. If dried crisp, they can be ground in a food processor or blender and used in recipes like you would use tomato paste. Yum!
The tomatoes turn black due to oxidation. Realizing steps were taken to reduce to amount of oxygen in the storage jars, over time oxygen will seep into the storage container and the oxygen absorbers will “wear out”. Most dehydrated products should be consumed within a year. They can also be stored in the freezer for a longer period.
So Easy to Preserve, page 348, mentions the black color due to oxidation and dried tomatoes' tendency to reabsorb moisture.
Oregon Extension recommends blanching, steaming, or heating tomatoes until just heated through to prevent the blackening. This reduces enzymatic activity. Blackening can also occur more intensely with low acid varieties.
I hope this is helpful. Good luck!
It's fine to store them as you described. It’s imperative that the tomatoes have been fully dried and conditioned before vacuum sealing. Tomatoes do reabsorb moisture readily, causing undesired color and flavor changes (see So Easy to Preserve, pg. 348). We would also recommend not storing past 6-9 months, per University of Minnesota Extension:
https://extension.umn.edu/preserving-and-preparing/how-dry-tomatoes-home.
Hope this helps!