In a medium bowl, mix the eggs with heavy cream and salt, using a hand mixer.
Open all the jars and divide the cubes of salami between them.
Pour the egg mixture over the salami, stopping about 1/3 inch from the top.
Divide the cheese between the jars, making sure it’s completely inside the jar. There cannot be any food pieces floating in a sous-vide container because it will ruin it. To be sure, I usually wipe the jars with a towel after sealing them.
Close the jars carefully to what is called “finger-tip closed position”. See notes for more details. Closing jars too tightly can cause them to explode but not closing them enough can cause a leak.
Place your jars along with the sous-vide circulator in your container. Make sure to have something underneath your container to protect your countertops as this is a very high temperature recipe (for sous-vide). Be careful not to drop jars into the water as that may damage them and later cause broken or exploded jars.
Cover and start pre-heating the sous-vide to 185 F (85 C). Once heated, cook for 25 minutes.
Using rubberized tongues or a jar lifter, carefully lift the jars one by one and let them cool a little bit, before placing them in the fridge.
If not eating right away, use a salad knife to run it around the inside of the jar and the flip upside down on to the plate to release. Microwave for 30 seconds and enjoy!