This is from Cooking with My Food Storage.  Very clear steps on how to use a vacuum sealer with a mason jar; not just for meals in a jar, but in general when I start dehydrating foods myself.  I also need to find the tip on how to do this with smaller jars inside a larger jar if you don’t have a jar sealer that fits smaller sizes and record that here for my reference as well.

A reminder about the basics of how to make a meal in a jar.

How to make a Meal-in-a-Jar:   Two Methods

Method 1:  Use a Food Saver to Seal the Jars

Step 1:  In a clean, dry quart jar, layer ingredients. Shake the powder down into the jar if needed.

Step 2:  Place the lid on the jar.  Don’t add the ring.

Step 3:  Attach one end of the hose to the accessory port and the other end to the jar sealer.  Place the jar sealer over the jar.

Step 4:  Turn on your food saver and remove the oxygen from the jar.

Step 5: Remove the jar sealer (it is easier to unhook the hose from the jar sealer first), add label and ring, store in a cool dry place.

Method 2:  Use Oxygen Absorbers

Step 1:  In a clean, dry quart jar, layer ingredients. Shake the powder down into the jar if needed.

Step 2:  Wipe the top of the jar with a paper towel to remove any powder.

Step 3:  Top with a 300 cc oxygen absorber. Seal tightly.

Step 4:  The lid should seal within a few hours.  Add label.  Store in a cool, dry place.